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The British Army is the principal land warfare force of the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
. the British Army comprises 73,847 regular full-time personnel, 4,127 Gurkhas, 25,742 volunteer reserve personnel and 4,697 "other personnel", for a total of 108,413. The British Army traces back to 1707 and the formation of the united
Kingdom of Great Britain Great Britain, also known as the Kingdom of Great Britain, was a sovereign state in Western Europe from 1707 to the end of 1800. The state was created by the 1706 Treaty of Union and ratified by the Acts of Union 1707, which united the Kingd ...
which joined the Kingdoms of
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
and
Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...
into a single state and, with that, united the English Army and the Scots Army as the British Army. The English
Bill of Rights 1689 The Bill of Rights 1689 (sometimes known as the Bill of Rights 1688) is an Act of Parliament (United Kingdom), act of the Parliament of England that set out certain basic civil rights and changed the succession to the Monarchy of England, Engl ...
and Scottish Claim of Right Act 1689 require parliamentary consent for
the Crown The Crown is a political concept used in Commonwealth realms. Depending on the context used, it generally refers to the entirety of the State (polity), state (or in federal realms, the relevant level of government in that state), the executive ...
to maintain a peacetime
standing army A standing army is a permanent, often professional, army. It is composed of full-time soldiers who may be either career soldiers or conscripts. It differs from army reserves, who are enrolled for the long term, but activated only during wars ...
. Members of the British Army swear allegiance to the
monarch A monarch () is a head of stateWebster's II New College Dictionary. "Monarch". Houghton Mifflin. Boston. 2001. p. 707. Life tenure, for life or until abdication, and therefore the head of state of a monarchy. A monarch may exercise the highest ...
as their commander-in-chief. The army is administered by the Ministry of Defence and commanded by the Chief of the General Staff. At its inception, being composed primarily of cavalry and infantry, the British Army was one of two ''Regular'' Forces (there were also separate ''Reserve Forces'') within the British military (those parts of the British Armed Forces tasked with land warfare, as opposed to the naval forces), with the other having been the ''Ordnance Military Corps'' (made up of the
Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
,
Royal Engineers The Corps of Royal Engineers, usually called the Royal Engineers (RE), and commonly known as the ''Sappers'', is the engineering arm of the British Army. It provides military engineering and other technical support to the British Armed Forces ...
, and the Royal Sappers and Miners) of the Board of Ordnance, which along with the originally civilian Commissariat Department, stores and supply departments, as well as barracks and other departments, were absorbed into the British Army when the Board of Ordnance was abolished in 1855. Various other civilian departments of the board were absorbed into the War Office. The British Army has seen action in major wars between the world's great powers, including the
Seven Years' War The Seven Years' War, 1756 to 1763, was a Great Power conflict fought primarily in Europe, with significant subsidiary campaigns in North America and South Asia. The protagonists were Kingdom of Great Britain, Great Britain and Kingdom of Prus ...
, the
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...
, the
Napoleonic Wars {{Infobox military conflict , conflict = Napoleonic Wars , partof = the French Revolutionary and Napoleonic Wars , image = Napoleonic Wars (revision).jpg , caption = Left to right, top to bottom:Battl ...
, the
Crimean War The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
and the First and
Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
s. Britain's victories in most of these decisive wars allowed it to influence world events and establish itself as one of the world's leading
military A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. Militaries are typically authorized and maintained by a sovereign state, with their members identifiable by a d ...
and
economic An economy is an area of the Production (economics), production, Distribution (economics), distribution and trade, as well as Consumption (economics), consumption of Goods (economics), goods and Service (economics), services. In general, it is ...
powers. Since the end of the
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
, the British Army has been deployed to a number of conflict zones, often as part of an expeditionary force, a
coalition A coalition is formed when two or more people or groups temporarily work together to achieve a common goal. The term is most frequently used to denote a formation of power in political, military, or economic spaces. Formation According to ''A G ...
force or part of a
United Nations peacekeeping Peacekeeping by the United Nations is a role of the United Nations's Department of Peace Operations and an "instrument developed by the organization as a way to help countries torn by conflict to create the conditions for lasting peace". It is ...
operation.


History


Formation

Until the Wars of the Three Kingdoms (1639–1653), neither England nor Scotland had had a
standing army A standing army is a permanent, often professional, army. It is composed of full-time soldiers who may be either career soldiers or conscripts. It differs from army reserves, who are enrolled for the long term, but activated only during wars ...
with professional officers and career corporals and sergeants. England relied on
militia A militia ( ) is a military or paramilitary force that comprises civilian members, as opposed to a professional standing army of regular, full-time military personnel. Militias may be raised in times of need to support regular troops or se ...
organised by local officials or private forces mobilised by the nobility, or on hired mercenaries from Europe. From the later Middle Ages until the Wars of the Three Kingdoms, when a foreign expeditionary force was needed, such as the one that
Henry V of England Henry V (16 September 1386 – 31 August 1422), also called Henry of Monmouth, was King of England from 1413 until his death in 1422. Despite his relatively short reign, Henry's outstanding military successes in the Hundred Years' War against ...
took to France and that fought at the
Battle of Agincourt The Battle of Agincourt ( ; ) was an English victory in the Hundred Years' War. It took place on 25 October 1415 (Saint Crispin's Day) near Azincourt, in northern France. The unexpected victory of the vastly outnumbered English troops agains ...
(1415), the army, a professional one, was raised for the duration of the expedition. During the Wars of the Three Kingdoms, the members of the English
Long Parliament The Long Parliament was an Parliament of England, English Parliament which lasted from 1640 until 1660, making it the longest-lasting Parliament in English and British history. It followed the fiasco of the Short Parliament, which had convened f ...
realised that the use of county militia organised into regional associations (such as the Eastern Association), often commanded by local members of Parliament (both from the House of Commons and the House of Lords), while more than able to hold their own in the regions which Parliamentarians ('Roundheads") controlled, were unlikely to win the war. So Parliament initiated two actions. The
Self-denying Ordinance The Self-denying Ordinance was passed by the Parliament of England, English Parliament on 3 April 1645. All members of the House of Commons or Lords who were also officers in the Parliamentary army or navy were required to resign one or the ot ...
forbade members of Parliament (with the notable exception of
Oliver Cromwell Oliver Cromwell (25 April 15993 September 1658) was an English statesman, politician and soldier, widely regarded as one of the most important figures in British history. He came to prominence during the Wars of the Three Kingdoms, initially ...
, then a member of parliament and future Lord Protector) from serving as officers in the Parliamentary armies. This created a distinction between the civilians in Parliament, who tended to be
Presbyterian Presbyterianism is a historically Reformed Protestant tradition named for its form of church government by representative assemblies of elders, known as "presbyters". Though other Reformed churches are structurally similar, the word ''Pr ...
and conciliatory to the Royalists ("Cavaliers") in nature, and a corps of professional officers, who tended to be Independent ( Congregational) in theology. The second action was legislation for the creation of a Parliamentary-funded army, commanded by Lord General
Thomas Fairfax Sir Thomas Fairfax (17 January 1612 – 12 November 1671) was an English army officer and politician who commanded the New Model Army from 1645 to 1650 during the English Civil War. Because of his dark hair, he was known as "Black Tom" to his l ...
, which became known as the New Model Army (originally phrased "new-modelled Army"). While this proved to be a war-winning formula, the New Model Army, being organised and politically active, went on to dominate the politics of the
Interregnum An interregnum (plural interregna or interregnums) is a period of revolutionary breach of legal continuity, discontinuity or "gap" in a government, organization, or social order. Archetypally, it was the period of time between the reign of one m ...
and by 1660 was widely disliked. The New Model Army was paid off and disbanded at the later Restoration of the monarchy in 1660 with the accession of King Charles II. For many decades the alleged excesses of the New Model Army under
the Protectorate The Protectorate, officially the Commonwealth of England, Scotland and Ireland, was the English form of government lasting from 16 December 1653 to 25 May 1659, under which the kingdoms of Kingdom of England, England, Kingdom of Scotland, Scotl ...
/ Commonwealth under Oliver Cromwell were used as propaganda (and still feature in Irish folklore) and the Whig Party element recoiled from allowing a standing army to continue with the agreed-upon rights and privileges under the return of a king. The militia acts of 1661 and 1662 prevented local authorities from calling up militia and oppressing their own local opponents. Calling up the militia was possible only if the king and local elites agreed to do so. King Charles II and his "
Cavalier The term ''Cavalier'' () was first used by Roundheads as a term of abuse for the wealthier royalist supporters of Charles I of England and his son Charles II of England, Charles II during the English Civil War, the Interregnum (England), Int ...
" / Royalist supporters favoured a new army under royal control, and immediately after the Restoration of 1660 to 1661 began working on its establishment. The first English Army regiments, including elements of the disbanded New Model Army, were formed between November 1660 and January 1661 and became a standing military force for England (financed by
Parliament In modern politics and history, a parliament is a legislative body of government. Generally, a modern parliament has three functions: Representation (politics), representing the Election#Suffrage, electorate, making laws, and overseeing ...
). The Royal Scots and Irish Armies were financed by the parliaments of
Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...
and
Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
. Parliamentary control was established by the
Bill of Rights 1689 The Bill of Rights 1689 (sometimes known as the Bill of Rights 1688) is an Act of Parliament (United Kingdom), act of the Parliament of England that set out certain basic civil rights and changed the succession to the Monarchy of England, Engl ...
and Claim of Right Act 1689, although the monarch continued to influence aspects of army administration until at least the end of the 19th century. After the Restoration, King Charles II pulled together four regiments of infantry and cavalry, calling them his guards, at a cost of £122,000 from his general budget. This became the foundation of the permanent English Army. By 1685, it had grown to number 7,500 soldiers in marching regiments, and 1,400 men permanently stationed in garrisons. A
Monmouth Rebellion The Monmouth Rebellion in June 1685 was an attempt to depose James II of England, James II, who in February had succeeded his brother Charles II of England, Charles II as king of Kingdom of England, England, Kingdom of Scotland, Scotland and ...
in 1685 allowed successor King James II to raise the forces to 20,000 men. There were 37,000 in 1678, when England played a role in the closing stage of the cross-channel
Franco-Dutch War The Franco-Dutch War, 1672 to 1678, was primarily fought by Kingdom of France, France and the Dutch Republic, with both sides backed at different times by a variety of allies. Related conflicts include the 1672 to 1674 Third Anglo-Dutch War and ...
. After
Protestant Protestantism is a branch of Christianity that emphasizes Justification (theology), justification of sinners Sola fide, through faith alone, the teaching that Salvation in Christianity, salvation comes by unmerited Grace in Christianity, divin ...
dual Monarchs William III, formerly William of the Dutch House of Orange, and his wife Mary II's joint accession to the throne after a short constitutional crisis with Parliament sending Mary's father, predecessor King James II, (who remained a Catholic) during his brief controversial reign, off the throne and into exile. England then involved itself in the War of the Grand Alliance on the Continent, primarily to prevent a possible French Catholic monarch organizing an invasion restoring the exiled James II (Queen Mary's father and still a
Roman Catholic The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...
). Later in 1689, William III to solidify his and Mary's hold on the monarchy, expanded the new English army to 74,000, and then a few years later to 94,000 in 1694. Parliament was very nervous and reduced the cadre to 70,000 in 1697. Scotland and Ireland had theoretically separate military establishments, but they were unofficially merged with the English Crown force. By the time of the 1707 Acts of Union, many regiments of the English and Scottish armies were combined under one operational command and stationed in the
Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...
for the
War of the Spanish Succession The War of the Spanish Succession was a European great power conflict fought between 1701 and 1714. The immediate cause was the death of the childless Charles II of Spain in November 1700, which led to a struggle for control of the Spanish E ...
. Although all the regiments were now part of the new British military establishment, they remained under the old operational-command structure and retained much of the institutional ethos, customs and traditions of the standing armies created shortly after the Restoration of the Monarchy 47 years earlier. The order of seniority of the most-senior British Army line regiments is based on that of the earlier English army. Although technically the Scots Royal Regiment of Foot was raised in 1633 and is the oldest Regiment of the Line, Scottish and Irish regiments were only allowed to take a rank in the English army on the date of their arrival in England (or the date when they were first placed on the English establishment). In 1694, a board of general officers was convened to decide the rank of English, Irish and Scots regiments serving in the Netherlands; the regiment which became known as the Scots Greys were designated the 4th Dragoons because there were three English regiments raised prior to 1688 when the Scots Greys were first placed in the English establishment. In 1713, when a new board of general officers was convened to decide the rank of several regiments, the seniority of the Scots Greys was reassessed and based on their June 1685 entry into England. At that time there was only one English regiment of dragoons, and the Scots Greys eventually received the British Army rank of 2nd Dragoons.


British Empire (1707–1914)

After 1707, British continental policy was to contain expansion by competing powers such as France and Spain. Although Spain was the dominant global power during the previous two centuries and the chief threat to England's early trans-Atlantic colonial ambitions, its influence was now waning. The territorial ambitions of the French, however, led to the War of the Spanish Succession and the later
Napoleonic Wars {{Infobox military conflict , conflict = Napoleonic Wars , partof = the French Revolutionary and Napoleonic Wars , image = Napoleonic Wars (revision).jpg , caption = Left to right, top to bottom:Battl ...
. Although the
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
is widely regarded as vital to the rise of the
British Empire The British Empire comprised the dominions, Crown colony, colonies, protectorates, League of Nations mandate, mandates, and other Dependent territory, territories ruled or administered by the United Kingdom and its predecessor states. It bega ...
, the British Army played an important role in the formation of colonies,
protectorate A protectorate, in the context of international relations, is a State (polity), state that is under protection by another state for defence against aggression and other violations of law. It is a dependent territory that enjoys autonomy over ...
s and
dominion A dominion was any of several largely self-governance, self-governing countries of the British Empire, once known collectively as the ''British Commonwealth of Nations''. Progressing from colonies, their degrees of self-governing colony, colon ...
s in the
Americas The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a sing ...
,
Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...
,
Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...
,
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
and
Australasia Australasia is a subregion of Oceania, comprising Australia, New Zealand (overlapping with Polynesia), and sometimes including New Guinea and surrounding islands (overlapping with Melanesia). The term is used in a number of different context ...
. British soldiers captured strategically important sites and territories, with the army involved in wars to secure the empire's borders, internal safety and support friendly governments and princes. Among these actions were the French and Indian War / Seven Years' War,. the
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...
, the
Napoleonic Wars {{Infobox military conflict , conflict = Napoleonic Wars , partof = the French Revolutionary and Napoleonic Wars , image = Napoleonic Wars (revision).jpg , caption = Left to right, top to bottom:Battl ...
,. the First and Second Opium Wars, the
Boxer Rebellion The Boxer Rebellion, also known as the Boxer Uprising, was an anti-foreign, anti-imperialist, and anti-Christian uprising in North China between 1899 and 1901, towards the end of the Qing dynasty, by the Society of Righteous and Harmonious F ...
,. the
New Zealand Wars The New Zealand Wars () took place from 1845 to 1872 between the Colony of New Zealand, New Zealand colonial government and allied Māori people, Māori on one side, and Māori and Māori-allied settlers on the other. Though the wars were initi ...
, the Australian frontier wars, the Sepoy Rebellion of 1857, the first and
second Boer War The Second Boer War (, , 11 October 189931 May 1902), also known as the Boer War, Transvaal War, Anglo–Boer War, or South African War, was a conflict fought between the British Empire and the two Boer republics (the South African Republic and ...
s, the Fenian raids, the
Irish War of Independence The Irish War of Independence (), also known as the Anglo-Irish War, was a guerrilla war fought in Ireland from 1919 to 1921 between the Irish Republican Army (1919–1922), Irish Republican Army (IRA, the army of the Irish Republic) and Unite ...
, interventions in
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...
(intended to maintain a buffer state between
British India The provinces of India, earlier presidencies of British India and still earlier, presidency towns, were the administrative divisions of British governance in South Asia. Collectively, they have been called British India. In one form or another ...
and the
Russian Empire The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...
) and the
Crimean War The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
(to keep the Russian Empire to the north on the
Black Sea The Black Sea is a marginal sea, marginal Mediterranean sea (oceanography), mediterranean sea lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bound ...
at a safe distance by aiding the
Ottoman Empire The Ottoman Empire (), also called the Turkish Empire, was an empire, imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Centr ...
).. Like the English Army, the British Army fought the kingdoms of Spain, France (including the
First French Empire The First French Empire or French Empire (; ), also known as Napoleonic France, was the empire ruled by Napoleon Bonaparte, who established French hegemony over much of continental Europe at the beginning of the 19th century. It lasted from ...
) and the Netherlands (
Dutch Republic The United Provinces of the Netherlands, commonly referred to in historiography as the Dutch Republic, was a confederation that existed from 1579 until the Batavian Revolution in 1795. It was a predecessor state of the present-day Netherlands ...
) for supremacy in
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
and the
West Indies The West Indies is an island subregion of the Americas, surrounded by the Atlantic Ocean, North Atlantic Ocean and the Caribbean Sea, which comprises 13 independent island country, island countries and 19 dependent territory, dependencies in thr ...
. With native and provincial and colonial assistance, the Army conquered
New France New France (, ) was the territory colonized by Kingdom of France, France in North America, beginning with the exploration of the Gulf of Saint Lawrence by Jacques Cartier in 1534 and ending with the cession of New France to Kingdom of Great Br ...
in the
French and Indian War The French and Indian War, 1754 to 1763, was a colonial conflict in North America between Kingdom of Great Britain, Great Britain and Kingdom of France, France, along with their respective Native Americans in the United States, Native American ...
(North American theatre) of the parallel
Seven Years' War The Seven Years' War, 1756 to 1763, was a Great Power conflict fought primarily in Europe, with significant subsidiary campaigns in North America and South Asia. The protagonists were Kingdom of Great Britain, Great Britain and Kingdom of Prus ...
and suppressed a Native / Indian North Americans uprising in Pontiac's War around the
Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...
. The British Army was defeated in the
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...
, losing the
Thirteen Colonies The Thirteen Colonies were the British colonies on the Atlantic coast of North America which broke away from the British Crown in the American Revolutionary War (1775–1783), and joined to form the United States of America. The Thirteen C ...
but retaining The Canadas and The Maritimes as in British North America, including
Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...
(originally part of the
Colony of Virginia The Colony of Virginia was a British Empire, British colonial settlement in North America from 1606 to 1776. The first effort to create an English settlement in the area was chartered in 1584 and established in 1585; the resulting Roanoke Colo ...
, and which had been originally strongly sympathetic to the American colonial rebels early in the war).
Halifax, Nova Scotia Halifax is the capital and most populous municipality of the Provinces and territories of Canada, Canadian province of Nova Scotia, and the most populous municipality in Atlantic Canada. As of 2024, it is estimated that the population of the H ...
and
Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...
were to become
Imperial fortress Robert Gascoyne-Cecil, 3rd Marquess of Salisbury, Lord Salisbury described Malta, Gibraltar, Bermuda, and Halifax as Imperial fortresses at the 1887 Colonial Conference, though by that point they had been so designated for decades. Later histor ...
es (although Bermuda, being safer from attack over water and impervious to attack overland, quickly became the most important in British North America), along with
Malta Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...
and
Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...
, providing bases in the eastern
Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...
and
Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Eur ...
for
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
squadrons to control the oceans and trade routes, and heavily garrisoned by the British Army both for defence of the bases and to provide mobile military forces to work with the Navy in amphibious operations throughout their regions. The British Army was heavily involved in the
Napoleonic Wars {{Infobox military conflict , conflict = Napoleonic Wars , partof = the French Revolutionary and Napoleonic Wars , image = Napoleonic Wars (revision).jpg , caption = Left to right, top to bottom:Battl ...
, participating in a number of campaigns in Europe (including continuous deployment in the
Peninsular War The Peninsular War (1808–1814) was fought in the Iberian Peninsula by Kingdom of Portugal, Portugal, Spain and the United Kingdom of Great Britain and Ireland, United Kingdom against the invading and occupying forces of the First French ...
), the
Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America ...
, North Africa and
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
. The war between the British and the
First French Empire The First French Empire or French Empire (; ), also known as Napoleonic France, was the empire ruled by Napoleon Bonaparte, who established French hegemony over much of continental Europe at the beginning of the 19th century. It lasted from ...
of
Napoleon Bonaparte Napoleon Bonaparte (born Napoleone di Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French general and statesman who rose to prominence during the French Revolution and led Military career ...
stretched around the world; at its peak in 1813, the regular army contained over 250,000 men. A coalition of Anglo-Dutch and Prussian armies under the Duke of Wellington and Field Marshal von Blücher finally defeated Napoleon at Waterloo in 1815. The English were involved politically and militarily in Ireland. The campaign of English republican Protector
Oliver Cromwell Oliver Cromwell (25 April 15993 September 1658) was an English statesman, politician and soldier, widely regarded as one of the most important figures in British history. He came to prominence during the Wars of the Three Kingdoms, initially ...
involved uncompromising treatment of the Irish towns (most notably
Drogheda Drogheda ( , ; , meaning "bridge at the ford") is an industrial and port town in County Louth on the east coast of Ireland, north of Dublin. It is located on the Dublin–Belfast corridor on the east coast of Ireland, mostly in County Louth ...
and
Wexford Wexford ( ; archaic Yola dialect, Yola: ''Weiseforthe'') is the county town of County Wexford, Republic of Ireland, Ireland. Wexford lies on the south side of Wexford Harbour, the estuary of the River Slaney near the southeastern corner of the ...
) which supported the Royalists during the
English Civil War The English Civil War or Great Rebellion was a series of civil wars and political machinations between Cavaliers, Royalists and Roundhead, Parliamentarians in the Kingdom of England from 1642 to 1651. Part of the wider 1639 to 1653 Wars of th ...
. The English Army (and the subsequent British Army) remained in Ireland primarily to suppress Irish revolts or disorder. In addition to its conflict with Irish nationalists, it was faced with the prospect of battling Anglo-Irish and Ulster Scots in Ireland who were angered by unfavourable taxation of Irish produce imported into Britain. With other Irish groups, they raised a volunteer army and threatened to emulate the American colonists if their conditions were not met. Learning from their experience in America, the British government sought a political solution. The British Army fought Irish rebels—Protestant and Catholic—primarily in
Ulster Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
and Leinster ( Wolfe Tone's
United Irishmen The Society of United Irishmen was a sworn association, formed in the wake of the French Revolution, to secure Representative democracy, representative government in Ireland. Despairing of constitutional reform, and in defiance both of British ...
) in the 1798 rebellion. In addition to battling the armies of other European empires (and its former colonies, the United States, in the
War of 1812 The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the Uni ...
), the British Army fought the Chinese in the First and Second Opium Wars and the
Boxer Rebellion The Boxer Rebellion, also known as the Boxer Uprising, was an anti-foreign, anti-imperialist, and anti-Christian uprising in North China between 1899 and 1901, towards the end of the Qing dynasty, by the Society of Righteous and Harmonious F ...
, Māori tribes in the first of the New Zealand Wars, Nawab Shiraj-ud-Daula's forces and
British East India Company The East India Company (EIC) was an English, and later British, joint-stock company that was founded in 1600 and dissolved in 1874. It was formed to Indian Ocean trade, trade in the Indian Ocean region, initially with the East Indies (South A ...
mutineers in the Sepoy Rebellion of 1857, the Boers in the first and second Boer Wars, Irish Fenians in Canada during the Fenian raids and Irish separatists in the Anglo-Irish War. The increasing demands of imperial expansion and the inadequacy and inefficiency of the underfunded British Army,
Militia A militia ( ) is a military or paramilitary force that comprises civilian members, as opposed to a professional standing army of regular, full-time military personnel. Militias may be raised in times of need to support regular troops or se ...
, Ordnance Military Corps, Yeomanry and Volunteer Force after the Napoleonic Wars led to series of reforms following the failures of the
Crimean War The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
. Inspired by the successes of the Prussian Army (which relied on short-term conscription of all eligible young men to maintain a large reserve of recently discharged soldiers, ready to be recalled on the outbreak of war to immediately bring the small peacetime regular army up to strength), the ''Regular Reserve'' of the British Army was originally created in 1859 by Secretary of State for War Sidney Herbert, and re-organised under the Reserve Force Act 1867. Prior to this, a soldier was generally enlisted into the British Army for a 21-year engagement, following which (should he survive so long) he was discharged as a Pensioner. Pensioners were sometimes still employed on garrison duties, as were younger soldiers no longer deemed fit for expeditionary service who were generally organised in invalid units or returned to the regimental depot for home service. The cost of paying pensioners, and the obligation the government was under to continue to employ invalids as well as soldiers deemed by their commanding officers as detriments to their units were motivations to change this system. The long period of engagement also discouraged many potential recruits. The long service enlistments were consequently replaced with short service enlistments, with undesirable soldiers not permitted to re-engage on the completion of their first engagement. The size of the army also fluctuated greatly, increasing in war time, and drastically shrinking with peace. Battalions posted on garrison duty overseas were allowed an increase on their normal peacetime establishment, which resulted in their having surplus men on their return to a ''Home'' station. Consequently, soldiers engaging on short term enlistments were enabled to serve several years with the colours and the remainder in the Regular Reserve, remaining liable for recall to the colours if required. Among the other benefits, this thereby enabled the British Army to have a ready pool of recently trained men to draw upon in an emergency. The name of the Regular Reserve (which for a time was divided into a ''First Class'' and a ''Second Class'') has resulted in confusion with the ''Reserve Forces'', which were the pre-existing part-time, local-service home-defence forces that were auxiliary to the British Army (or ''Regular Force''), but not originally part of it: the Yeomanry,
Militia A militia ( ) is a military or paramilitary force that comprises civilian members, as opposed to a professional standing army of regular, full-time military personnel. Militias may be raised in times of need to support regular troops or se ...
(or ''Constitutional Force'') and Volunteer Force. These were consequently also referred to as ''Auxiliary Forces'' or ''Local Forces''. The late-19th-century Cardwell and Childers Reforms gave the army its modern shape and redefined its regimental system. The 1907 Haldane Reforms created the Territorial Force as the army's volunteer reserve component, merging and reorganising the Volunteer Force and Yeomanry, while the Militia was replaced by the Special Reserve.


World Wars (1914–1945)

Great Britain was challenged by other powers, primarily the
German Empire The German Empire (),; ; World Book, Inc. ''The World Book dictionary, Volume 1''. World Book, Inc., 2003. p. 572. States that Deutsches Reich translates as "German Realm" and was a former official name of Germany. also referred to as Imperia ...
and
Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...
, during the 20th century. A century earlier it vied with Napoleonic France for global pre-eminence, and Hanoverian Britain's natural allies were the kingdoms and principalities of
northern Germany Northern Germany (, ) is a linguistic, geographic, socio-cultural and historic region in the northern part of Germany which includes the coastal states of Schleswig-Holstein, Mecklenburg-Vorpommern and Lower Saxony and the two city-states Hambur ...
. By the middle of the 19th century, Britain and France were allies in preventing Russia's appropriation of the
Ottoman Empire The Ottoman Empire (), also called the Turkish Empire, was an empire, imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Centr ...
, although the fear of French invasion led shortly afterwards to the creation of the Volunteer Force. By the first decade of the 20th century, the United Kingdom was allied with France (by the Entente Cordiale) and Russia (which had a secret agreement with France for mutual support in a war against the
Prussia Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...
n-led German Empire and the Austro-Hungarian Empire). When the First World War broke out in August 1914 the British Army sent the British Expeditionary Force (BEF), consisting mainly of
regular army A regular army is the official army of a state or country (the official armed forces), contrasting with irregular forces, such as volunteer irregular militias, private armies, mercenaries, etc. A regular army usually has the following: * a ...
troops, to France and Belgium. The fighting bogged down into static
trench warfare Trench warfare is a type of land warfare using occupied lines largely comprising Trench#Military engineering, military trenches, in which combatants are well-protected from the enemy's small arms fire and are substantially sheltered from a ...
for the remainder of the war. In 1915 the army created the Mediterranean Expeditionary Force to invade the
Ottoman Empire The Ottoman Empire (), also called the Turkish Empire, was an empire, imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Centr ...
via Gallipoli, an unsuccessful attempt to capture
Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
and secure a sea route to
Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
. The First World War was the most devastating in British military history, with nearly 800,000 men killed and over two million wounded. Early in the war, the BEF was virtually destroyed and was replaced first by
volunteers Volunteering is an elective and freely chosen act of an individual or group giving their time and labor, often for community service. Many volunteers are specifically trained in the areas they work, such as medicine, education, or emergenc ...
and then by a conscript force. Major battles included those at the Somme and Passchendaele. Advances in technology saw the advent of the
tank A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; ...
(and the creation of the
Royal Tank Regiment The Royal Tank Regiment (RTR) is the oldest tank unit in the world, being formed by the British Army in 1916 during the World War I, First World War. Today, it is an Armoured warfare, armoured regiment equipped with Challenger 2 main battle tanks ...
) and advances in aircraft design (and the creation of the
Royal Flying Corps The Royal Flying Corps (RFC) was the air arm of the British Army before and during the First World War until it merged with the Royal Naval Air Service on 1 April 1918 to form the Royal Air Force. During the early part of the war, the RFC sup ...
) which would be decisive in future battles. Trench warfare dominated Western Front strategy for most of the war, and the use of chemical weapons (disabling and poison gases) added to the devastation. The
Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
broke out in September 1939 with the Soviet and
German Army The German Army (, 'army') is the land component of the armed forces of Federal Republic of Germany, Germany. The present-day German Army was founded in 1955 as part of the newly formed West German together with the German Navy, ''Marine'' (G ...
's
invasion of Poland The invasion of Poland, also known as the September Campaign, Polish Campaign, and Polish Defensive War of 1939 (1 September – 6 October 1939), was a joint attack on the Second Polish Republic, Republic of Poland by Nazi Germany, the Slovak R ...
.. British assurances to the Poles led the British Empire to declare war on
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
. As in the First World War, a relatively small BEF was sent to France but then hastily evacuated from
Dunkirk Dunkirk ( ; ; ; Picard language, Picard: ''Dunkèke''; ; or ) is a major port city in the Departments of France, department of Nord (French department), Nord in northern France. It lies from the Belgium, Belgian border. It has the third-larg ...
as the German forces swept through the Low Countries and across France in May 1940.. After the British Army recovered from its earlier defeats, it defeated the Germans and Italians at the
Second Battle of El Alamein The Second Battle of El Alamein (23 October – 11 November 1942) was a battle of the Second World War that took place near the Egyptian Railway station, railway halt of El Alamein. The First Battle of El Alamein and the Battle of Alam el Halfa ...
in
North Africa North Africa (sometimes Northern Africa) is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of t ...
in 1942–1943 and helped drive them from Africa. It then fought through
Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
and, with the help of American, Canadian, Australian, New Zealand, Indian and Free French forces, was the principal organiser and participant in the D-Day invasion of Normandy on 6 June 1944; nearly half the Allied soldiers were British. In the
Far East The Far East is the geographical region that encompasses the easternmost portion of the Asian continent, including North Asia, North, East Asia, East and Southeast Asia. South Asia is sometimes also included in the definition of the term. In mod ...
, the British Army rallied against the Japanese in the
Burma Campaign The Burma campaign was a series of battles fought in the British colony of British rule in Burma, Burma as part of the South-East Asian theatre of World War II. It primarily involved forces of the Allies of World War II, Allies (mainly from ...
and regained the British Far Eastern colonial possessions.


Postcolonial era (1945–2000)

After the Second World War the British Army was significantly reduced in size, although National Service continued until 1960. This period saw decolonisation begin with the partition and
independence Independence is a condition of a nation, country, or state, in which residents and population, or some portion thereof, exercise self-government, and usually sovereignty, over its territory. The opposite of independence is the status of ...
of India and Pakistan, followed by the independence of British colonies in Africa and Asia. The Corps Warrant, which is the official list of which bodies of the British Military (not to be confused with ''naval'') Forces were to be considered Corps of the British Army for the purposes of the Army Act, the Reserve Forces Act, 1882, and the Territorial and Reserve Forces Act, 1907, had not been updated since 1926 (Army Order 49 of 1926), although amendments had been made up to and including Army Order 67 of 1950. A new Corps Warrant was declared in 1951. Although the British Army was a major participant in
Korea Korea is a peninsular region in East Asia consisting of the Korean Peninsula, Jeju Island, and smaller islands. Since the end of World War II in 1945, it has been politically Division of Korea, divided at or near the 38th parallel north, 3 ...
in the early 1950s and
Suez Suez (, , , ) is a Port#Seaport, seaport city with a population of about 800,000 in north-eastern Egypt, located on the north coast of the Gulf of Suez on the Red Sea, near the southern terminus of the Suez Canal. It is the capital and largest c ...
in 1956, during this period Britain's role in world events was reduced and the army was downsized. The British Army of the Rhine, consisting of I (BR) Corps, remained in Germany as a bulwark against Soviet invasion. The
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
continued, with significant technological advances in warfare, and the army saw the introduction of new weapons systems. Despite the decline of the British Empire, the army was engaged in
Aden Aden () is a port city located in Yemen in the southern part of the Arabian peninsula, on the north coast of the Gulf of Aden, positioned near the eastern approach to the Red Sea. It is situated approximately 170 km (110 mi) east of ...
,
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania, between the Indian Ocean, Indian and Pacific Ocean, Pacific oceans. Comprising over List of islands of Indonesia, 17,000 islands, including Sumatra, ...
,
Cyprus Cyprus (), officially the Republic of Cyprus, is an island country in the eastern Mediterranean Sea. Situated in West Asia, its cultural identity and geopolitical orientation are overwhelmingly Southeast European. Cyprus is the List of isl ...
,
Kenya Kenya, officially the Republic of Kenya, is a country located in East Africa. With an estimated population of more than 52.4 million as of mid-2024, Kenya is the 27th-most-populous country in the world and the 7th most populous in Africa. ...
and Malaya. In 1982, the British Army and the
Royal Marines The Royal Marines provide the United Kingdom's amphibious warfare, amphibious special operations capable commando force, one of the :Fighting Arms of the Royal Navy, five fighting arms of the Royal Navy, a Company (military unit), company str ...
helped liberate the
Falkland Islands The Falkland Islands (; ), commonly referred to as The Falklands, is an archipelago in the South Atlantic Ocean on the Patagonian Shelf. The principal islands are about east of South America's southern Patagonian coast and from Cape Dub ...
during the conflict with Argentina after that country's invasion of the British territory. In the three decades following 1969, the army was heavily deployed in
Northern Ireland Northern Ireland ( ; ) is a Countries of the United Kingdom, part of the United Kingdom in the north-east of the island of Ireland. It has been #Descriptions, variously described as a country, province or region. Northern Ireland shares Repub ...
's Operation Banner to support the
Royal Ulster Constabulary The Royal Ulster Constabulary (RUC) was the police force in Northern Ireland from 1922 to 2001. It was founded on 1 June 1922 as a successor to the Royal Irish Constabulary (RIC) Richard Doherty, ''The Thin Green Line – The History of the ...
(later the Police Service of Northern Ireland) in their conflict with republican paramilitary groups. The locally recruited Ulster Defence Regiment was formed, becoming home-service battalions of the Royal Irish Regiment in 1992 before it was disbanded in 2006. Over 700 soldiers were killed during
the Troubles The Troubles () were an ethno-nationalist conflict in Northern Ireland that lasted for about 30 years from the late 1960s to 1998. Also known internationally as the Northern Ireland conflict, it began in the late 1960s and is usually deemed t ...
. Following the 1994–1996 IRA ceasefires and since 1997, demilitarisation has been part of the peace process and the military presence has been reduced. On 25 June 2007 the 2nd Battalion of the Princess of Wales's Royal Regiment left the army complex in Bessbrook,
County Armagh County Armagh ( ) is one of the six counties of Northern Ireland and one of the traditional thirty-two counties of Ireland. It is located in the Provinces of Ireland, province of Ulster and adjoins the southern shore of Lough Neagh. It borders t ...
, ending the longest operation in British Army history.


Persian Gulf War

The British Army contributed 50,000 troops to the coalition which fought
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
in the Persian Gulf War, and British forces controlled
Kuwait Kuwait, officially the State of Kuwait, is a country in West Asia and the geopolitical region known as the Middle East. It is situated in the northern edge of the Arabian Peninsula at the head of the Persian Gulf, bordering Iraq to Iraq–Kuwait ...
after its liberation. Forty-seven British military personnel died during the war.


Balkan conflicts

The army was deployed to former
Yugoslavia , common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p ...
in 1992. Initially part of the United Nations Protection Force, in 1995 its command was transferred to the Implementation Force (IFOR) and then to the Stabilisation Force in Bosnia and Herzegovina (SFOR); the commitment rose to over 10,000 troops. In 1999, British forces under SFOR command were sent to
Kosovo Kosovo, officially the Republic of Kosovo, is a landlocked country in Southeast Europe with International recognition of Kosovo, partial diplomatic recognition. It is bordered by Albania to the southwest, Montenegro to the west, Serbia to the ...
and the contingent increased to 19,000 troops. Between early 1993 and June 2010, 72 British military personnel died during operations in the former Yugoslavian countries of Bosnia, Kosovo and Macedonia.


The Troubles

Although there have been permanent garrisons in Northern Ireland throughout its history, the British Army was deployed as a peacekeeping force from 1969 to 2007 in Operation Banner. Initially, this was (in the wake of unionist attacks on nationalist communities in
Derry Derry, officially Londonderry, is the second-largest City status in the United Kingdom, city in Northern Ireland, and the fifth-largest on the island of Ireland. Located in County Londonderry, the city now covers both banks of the River Fo ...
and
Belfast Belfast (, , , ; from ) is the capital city and principal port of Northern Ireland, standing on the banks of the River Lagan and connected to the open sea through Belfast Lough and the North Channel (Great Britain and Ireland), North Channel ...
) to prevent further loyalist attacks on Catholic communities; it developed into support of the
Royal Ulster Constabulary The Royal Ulster Constabulary (RUC) was the police force in Northern Ireland from 1922 to 2001. It was founded on 1 June 1922 as a successor to the Royal Irish Constabulary (RIC) Richard Doherty, ''The Thin Green Line – The History of the ...
(RUC) and its successor, the Police Service of Northern Ireland (PSNI) against the
Provisional Irish Republican Army The Provisional Irish Republican Army (Provisional IRA), officially known as the Irish Republican Army (IRA; ) and informally known as the Provos, was an Irish republican paramilitary force that sought to end British rule in Northern Ireland ...
(PIRA). Under the 1998 Good Friday Agreement, there was a gradual reduction in the number of soldiers deployed. In 2005, after the PIRA declared a ceasefire, the British Army dismantled posts, withdrew many troops and restored troop levels to those of a peacetime garrison. Operation Banner ended at midnight on 31 July 2007 after about 38 years of continuous deployment, the longest in British Army history. According to an internal document released in 2007, the British Army had failed to defeat the IRA but made it impossible for them to win by violence. Operation Helvetic replaced Operation Banner in 2007, maintaining fewer service personnel in a more-benign environment. Of the 300,000 troops who served in Northern Ireland since 1969, there were 763 British military personnel killed and 306 killed by the British military, mostly civilians. An estimated 100 soldiers committed suicide during Operation Banner or soon afterwards and a similar number died in accidents. A total of 6,116 were wounded. Sierra Leone The British Army deployed to Sierra Leone for Operation Palliser in 1999, under United Nations resolutions, to aid the government in quelling violent uprisings by militiamen. British troops also provided support during the 2014 West African Ebola virus epidemic.


Recent history (2000–present)


War in Afghanistan

In November 2001, as part of Operation Enduring Freedom with the United States, the United Kingdom deployed forces in
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. It is bordered by Pakistan to the Durand Line, east and south, Iran to the Afghanistan–Iran borde ...
to topple the
Taliban , leader1_title = Supreme Leader of Afghanistan, Supreme leaders , leader1_name = {{indented plainlist, * Mullah Omar{{Natural Causes{{nbsp(1994–2013) * Akhtar Mansour{{Assassinated (2015–2016) * Hibatullah Akhundzada (2016–present) ...
in Operation Herrick. The 3rd Division were sent to
Kabul Kabul is the capital and largest city of Afghanistan. Located in the eastern half of the country, it is also a municipality, forming part of the Kabul Province. The city is divided for administration into #Districts, 22 municipal districts. A ...
to assist in the liberation of the capital and defeat Taliban forces in the mountains. In 2006 the British Army began concentrating on fighting Taliban forces and bringing security to
Helmand Province Helmand (Pashto language, Pashto/Dari language, Dari: ; ), also known as Hillmand, in ancient times, as Hermand and Hethumand, is one of the 34 provinces of Afghanistan, in the south of the country. It is the largest province by area, covering ...
, with about 9,500 British troops (including marines, airmen and sailors) deployed at its peak—the second-largest force after that of the US. In December 2012 Prime Minister
David Cameron David William Donald Cameron, Baron Cameron of Chipping Norton (born 9 October 1966) is a British politician who served as Prime Minister of the United Kingdom from 2010 to 2016. Until 2015, he led the first coalition government in the UK s ...
announced that the combat mission would end in 2014, and troop numbers gradually fell as the
Afghan National Army The Islamic National Army (, ), also referred to as the Islamic Emirate Army and the Afghan Army, is the army, land force branch of the Afghan Armed Forces. The roots of an army in Afghanistan can be traced back to the early 18th century when th ...
took over the brunt of the fighting. Between 2001 and 26 April 2014 a total of 453 British military personnel died in Afghan operations. Operation Herrick ended with the handover of Camp Bastion on 26 October 2014, but the British Army maintained a deployment in Afghanistan as part of Operation Toral. Following an announcement by the US Government of the end of their operations in the Afghanistan, the Ministry of Defence announced in April 2021 that British forces would withdraw from the country by 11 September 2021. It was later reported that all UK troops would be out by early July. Following the collapse of the Afghan Army, and the completion of the withdrawal of civilians, all British troops had left by the end of August 2021.


Iraq War

In 2003, the United Kingdom was a major contributor to the invasion of Iraq, sending a force of over 46,000 military personnel. The British Army controlled southern Iraq, and maintained a peace-keeping presence in
Basra Basra () is a port city in Iraq, southern Iraq. It is the capital of the eponymous Basra Governorate, as well as the List of largest cities of Iraq, third largest city in Iraq overall, behind Baghdad and Mosul. Located near the Iran–Iraq bor ...
. All British troops were withdrawn from Iraq by 30 April 2009, after the Iraqi government refused to extend their mandate. One hundred and seventy-nine British military personnel died in Iraqi operations. The
British Armed Forces The British Armed Forces are the unified military, military forces responsible for the defence of the United Kingdom, its British Overseas Territories, Overseas Territories and the Crown Dependencies. They also promote the UK's wider interests ...
returned to Iraq in 2014 as part of Operation Shader to counter the
Islamic State The Islamic State (IS), also known as the Islamic State of Iraq and the Levant (ISIL), the Islamic State of Iraq and Syria (ISIS) and Daesh, is a transnational Salafi jihadism, Salafi jihadist organization and unrecognized quasi-state. IS ...
(ISIL).


Recent military aid

The British Army maintains a standing liability to support the civil authorities in certain circumstances, usually in either niche capabilities (e.g. explosive ordnance removal) or in general support of the civil authorities when their capacity is exceeded. In recent years this has been seen as army personnel supporting the civil authorities in the face of the 2001 United Kingdom foot-and-mouth outbreak, the 2002 firefighters strike, widespread flooding in 2005, 2007, 2009, 2013 and 2014, Operation Temperer following the
Manchester Arena bombing The Manchester Arena bombing, or Manchester Arena attack, was an Islamic terrorism in Europe, Islamic terrorist suicide bombing of Manchester Arena in Manchester, England, on 22 May 2017, following Dangerous Woman Tour, a concert by the Americ ...
in 2017 and, most recently, Operation Rescript during the
COVID-19 pandemic The COVID-19 pandemic (also known as the coronavirus pandemic and COVID pandemic), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), began with an disease outbreak, outbreak of COVID-19 in Wuhan, China, in December ...
.


Baltic States

Since 2016, the British Army has maintained a presence in the
Baltic States The Baltic states or the Baltic countries is a geopolitical term encompassing Estonia, Latvia, and Lithuania. All three countries are members of NATO, the European Union, the Eurozone, and the OECD. The three sovereign states on the eastern co ...
in support of the NATO Enhanced Forward Presence strategy which responded to the 2014 Russian annexation of Crimea. The British Army leads a multinational armoured battlegroup in
Estonia Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...
under Operation Cabrit and contributes troops to another military battle group in
Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...
. As part of the NATO plans, Britain has committed a full mechanized infantry
brigade A brigade is a major tactical military unit, military formation that typically comprises three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute ...
to be on a high state of readiness to defend Estonia.


Ukraine

Between 2015 and 2022, the British Army deployed Short Term Training Teams (STTTs) to
Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
under Operation Orbital to help train the Armed Forces of Ukraine against further Russian aggression. This operation was succeeded by Operation Interflex in July 2022.


Modern army


Personnel

The British Army has been a volunteer force since national service ended during the 1960s. Since the creation of the part-time, reserve Territorial Force in 1908 (renamed the Army Reserve in 2014), the full-time British Army has been known as the Regular Army. In July 2020 there were just over 78,800 Regulars, with a target strength of 82,000, and just over 30,000 Army Reservists, with a target strength of 30,000. All former Regular Army personnel may also be recalled to duty in exceptional circumstances during the 6-year period following completion of their Regular service, which creates an additional force known as the Regular Reserve. The table below illustrates British Army personnel figures from 1710 to 2025.


Equipment


Infantry

The British Army's basic weapon is the 5.56 mm L85A2 or L85A3 assault rifle, with some specialist personnel using the L22A2 carbine variant (pilots and some tank crew). The weapon was traditionally equipped with either iron sights or an optical
SUSAT The Sight Unit Small Arms, Trilux, or SUSAT, is a 4× telescopic sight, with Tritium illumination , tritium-powered illumination utilised at dusk or dawn. The full name of the current model is the SUSAT L9A1. The sight is not designed as a sniper ...
, although other optical sights have been subsequently purchased to supplement these. The weapon can be enhanced further utilising the
Picatinny rail The 1913 rail (MIL-STD-1913 rail) is an American rail integration system designed by Richard Swan that provides a mounting platform for firearm accessories. It forms part of the NATO standard STANAG 2324 rail. It was originally used for mount ...
with attachments such as the L17A2 under-barrel grenade launcher. In 2023, the Army Special Operations Brigade, which includes the Ranger Regiment, began using the L403A1, an AR-pattern rifle also used by the
Royal Marines The Royal Marines provide the United Kingdom's amphibious warfare, amphibious special operations capable commando force, one of the :Fighting Arms of the Royal Navy, five fighting arms of the Royal Navy, a Company (military unit), company str ...
. Some soldiers are equipped with the 7.62mm L129A1 sharpshooter rifle, which in 2018 formally replaced the L86A2 Light Support Weapon. Support fire is provided by the L7 general-purpose machine gun (GPMG), and indirect fire is provided by L16 81mm mortars. Sniper rifles include the L118A1 7.62 mm, L115A3 and the AW50F, all manufactured by
Accuracy International Accuracy International is a British firearms manufacturer based in Portsmouth, England. The company specializes in sniper rifles, anti-materiel rifles and civilian competition rifles. The company was founded in 1978 by a group of individual ...
. The British Army utilises the Glock 17 as its side arm. Anti tank guided weapons include the
Javelin A javelin is a light spear designed primarily to be thrown, historically as a ranged weapon. Today, the javelin is predominantly used for sporting purposes such as the javelin throw. The javelin is nearly always thrown by hand, unlike the sling ...
, the medium range anti-tank guided weapon replacement for
Milan Milan ( , , ; ) is a city in northern Italy, regional capital of Lombardy, the largest city in Italy by urban area and the List of cities in Italy, second-most-populous city proper in Italy after Rome. The city proper has a population of nea ...
, with overfly and direct attack modes of operation, and the NLAW. The Next-generation Light Anti-tank Weapon ( NLAW) is the first, non-expert, short-range, anti-tank missile that rapidly knocks out any main battle tank in just one shot by striking it from above.


Armour

The army's main battle tank is the Challenger 2, which is being upgraded to Challenger 3. It is supported by the Warrior tracked armoured vehicle as the primary
infantry fighting vehicle An infantry fighting vehicle (IFV), also known as a mechanized infantry combat vehicle (MICV), is a type of armoured fighting vehicle and armoured personnel carrier used to carry infantry into battle and provide direct fire, direct-fire suppo ...
, (which will soon be replaced by the Boxer 8x8 armoured fighting vehicle) and the Bulldog armoured personnel carrier. Light armoured units often utilise the Supacat "Jackal" MWMIK and Coyote tactical support vehicle for reconnaissance and fire support.


Artillery

The army has three main artillery systems: the M270 multiple launch rocket system (MLRS), the Archer and the L118 light gun. The MLRS, first used in Operation Granby, has an standard range, or with the PrSM, up to 500 km. The Archer is a 155 mm self-propelled armoured gun with a range. The L118 light gun is a 105 mm towed gun, which is typically towed by a Pinzgauer all-terrain vehicle. To identify artillery targets, the army operates the TAIPAN artillery detection radar and utilises artillery sound ranging. For air defence it uses the new Sky Sabre system, which in 2021 replaced the
Rapier A rapier () is a type of sword originally used in Spain (known as ' -) and Italy (known as '' spada da lato a striscia''). The name designates a sword with a straight, slender and sharply pointed two-edged long blade wielded in one hand. It wa ...
. It also deploys the Very Short-Range Air Defence (VSHORAD) Starstreak HVM (high-velocity missile) launched by a single soldier or from a Stormer HVM vehicle-mounted launcher.


Protected mobility

Where armour is not required or mobility and speed are favoured the British Army utilises protected patrol vehicles, such as the Panther variant of the Iveco LMV, the Foxhound, and variants of the
Cougar The cougar (''Puma concolor'') (, ''Help:Pronunciation respelling key, KOO-gər''), also called puma, mountain lion, catamount and panther is a large small cat native to the Americas. It inhabits North America, North, Central America, Cent ...
family (such as the Ridgeback, Husky and Mastiff). For day-to-day utility work the army commonly uses the Land Rover Wolf, which is based on the Land Rover Defender.


Engineers, utility and signals

Specialist engineering vehicles include bomb-disposal robots such as the T7 Multi-Mission Robotic System and the modern variants of the Armoured Vehicle Royal Engineers, including the Titan bridge-layer, Trojan armoured engineer vehicle, Terrier armoured digger. Day-to-day utility work uses a series of support vehicles, including six-, nine- and fifteen-tonne
MAN A man is an adult male human. Before adulthood, a male child or adolescent is referred to as a boy. Like most other male mammals, a man's genome usually inherits an X chromosome from the mother and a Y chromosome from the f ...
trucks, Oshkosh heavy-equipment transporters (HET), close-support tankers, quad bikes and ambulances. Tactical communication uses the Bowman radio system, and operational or strategic communication is controlled by the
Royal Corps of Signals The Royal Corps of Signals (often simply known as the Royal Signals – abbreviated to R SIGNALS) is one of the combat support arms of the British Army. Signals units are among the first into action, providing the battlefield communications an ...
.


Aviation

The Army Air Corps (AAC) provides direct aviation support, with the
Royal Air Force The Royal Air Force (RAF) is the Air force, air and space force of the United Kingdom, British Overseas Territories and Crown Dependencies. It was formed towards the end of the World War I, First World War on 1 April 1918, on the merger of t ...
providing support helicopters. The primary attack helicopter is the Boeing AH-64E Apache which replaced the AgustaWestland Apache AH-1 in the anti-tank, anti-air defence, and anti-armour role. The AgustaWestland AW159 Wildcat is a dedicated intelligence, surveillance, target acquisition, and reconnaissance (ISTAR) helicopter. The Eurocopter AS 365N Dauphin is used for
special operations Special operations or special ops are military activities conducted, according to NATO, by "specially designated, organized, selected, trained, and equipped forces using unconventional techniques and modes of employment." Special operations ma ...
aviation, primarily counter terrorism operations, within the UK. The army operates
unmanned aerial vehicle An unmanned aerial vehicle (UAV) or unmanned aircraft system (UAS), commonly known as a drone, is an aircraft with no human pilot, crew, or passengers onboard, but rather is controlled remotely or is autonomous.De Gruyter Handbook of Dron ...
s in a surveillance role, such as the small Lockheed Martin Desert Hawk III. File:MCV-80.jpg, alt=Tank with painted camouflage, Warrior IFV File:GUNNERS ON TARGET FOR EXERCISE STEEL SABRE IN NORTHUMBERLAND MOD 45159595.jpg, alt=Rocket launcher, Guided multiple launch rocket system (GMLRS) File:Challenger 2 MBT in Estonia-902250.jpeg, Challenger 2 File:AH64E Bourget 2019.jpg, Apache AH64-E File:New SA80 A3 Assault Rifle MOD 45163883.jpg, L85A3 (SA80A3)


Current deployments


Low-intensity operations


Permanent overseas postings


Structure

Army Headquarters is located in
Andover, Hampshire Andover ( ) is a town in the Test Valley district of Hampshire, England. The town is on the River Anton, a major tributary of the River Test, Test, and lies alongside the major A303 road, A303 trunk road at the eastern end of Salisbury Plain, ...
, and is responsible for providing forces at operational readiness for employment by the
Permanent Joint Headquarters The Permanent Joint Headquarters (PJHQ) is the British tri-service headquarters from where all overseas military operations are planned and controlled. It is situated at Northwood Headquarters in Northwood, London. The Permanent Joint Headqua ...
. The command structure is hierarchical, with overall command residing with the Chief of the General Staff (CGS), who is immediately subordinate to The Chief of Defence Staff, the head of the British Armed Services. The CGS is supported by the Deputy Chief of the General Staff. Army Headquarters is further organised into two subordinate commands,
Field Army A field army (also known as numbered army or simply army) is a military formation in many armed forces, composed of two or more corps. It may be subordinate to an army group. Air army, Air armies are the equivalent formations in air forces, and ...
and Home Command, each commanded by a
lieutenant general Lieutenant general (Lt Gen, LTG and similar) is a military rank used in many countries. The rank traces its origins to the Middle Ages, where the title of lieutenant general was held by the second-in-command on the battlefield, who was norma ...
. These two Commands serve distinct purposes and are divided into a structure of
divisions Division may refer to: Mathematics *Division (mathematics), the inverse of multiplication * Division algorithm, a method for computing the result of mathematical division Military *Division (military), a formation typically consisting of 10,000 t ...
and
brigade A brigade is a major tactical military unit, military formation that typically comprises three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute ...
s, which themselves consist of a complex mix of smaller units such as
Battalion A battalion is a military unit, typically consisting of up to one thousand soldiers. A battalion is commanded by a lieutenant colonel and subdivided into several Company (military unit), companies, each typically commanded by a Major (rank), ...
s. British Army units are either full-time 'Regular' units, or part-time Army Reserve units.


Allied Rapid Reaction Corps

Led by a British Army three-star general, one of
NATO The North Atlantic Treaty Organization (NATO ; , OTAN), also called the North Atlantic Alliance, is an intergovernmental organization, intergovernmental Transnationalism, transnational military alliance of 32 Member states of NATO, member s ...
's High Readiness (Land) Forces based in Gloucestershire, UK, with the following British units under its command: * 1st Signal Brigade * 104th Theatre Sustainment Brigade * 7th Air Defence Group * 8th Engineer Brigade


Field Army

Led by Commander Field Army, the Field Army is responsible for generating and preparing forces for current and contingency operations. The Field Army comprises: * 1st (United Kingdom) Division * 3rd (United Kingdom) Division * Field Army Troops


Home Command

Home Command is the British Army's supporting command; a generating, recruiting and training force that supports the Field Army and delivers UK resilience. It comprises * Army Personnel Centre, which deals with personnel issues and liaises with outside agencies. * Army Personnel Services Group, which supports personnel administration * Army Recruiting and Initial Training Command, which is responsible for all recruiting and training of Officers and Soldiers. * London District Command, which is the main headquarters for all British Army units within the M25 corridor of London. It also provides for London's ceremonial events as well as supporting operational deployments overseas. * Regional Command, which enables the delivery of a secure home front that sustains the Army, notably helping to coordinate the British Army's support to the civil authorities, overseeing the British Army's Welfare Service, and delivering the British Army's civil engagement mission. * Standing Joint Command, which coordinates defence's contribution to UK resilience operations in support of other government departments.


Special Forces

The British Army contributes two of the three
special forces Special forces or special operations forces (SOF) are military units trained to conduct special operations. NATO has defined special operations as "military activities conducted by specially designated, organized, selected, trained and equip ...
formations to the United Kingdom Special Forces directorate: the
Special Air Service The Special Air Service (SAS) is a special forces unit of the British Army. It was founded as a regiment in 1941 by David Stirling, and in 1950 it was reconstituted as a corps. The unit specialises in a number of roles including counter-terr ...
(SAS) and Special Reconnaissance Regiment (SRR). The SAS consists of one regular and two reserve regiments. The regular regiment, 22 SAS, has its headquarters at Stirling Lines, Credenhill,
Herefordshire Herefordshire ( ) is a Ceremonial counties of England, ceremonial county in the West Midlands (region), West Midlands of England, bordered by Shropshire to the north, Worcestershire to the east, Gloucestershire to the south-east, and the Welsh ...
. It consists of 5 squadrons (A, B, D, G and Reserve) and a training wing. 22 SAS is supported by 2 reserve regiments, 21 SAS and 23 SAS, which collectively form the Special Air Service (Reserve) (SAS , who in 2020 were transferred back under the command of Director of Special Forces after previously being under the command of the 1st Intelligence, Surveillance and Reconnaissance Brigade. The SRR, formed in 2005, performs close reconnaissance and special surveillance tasks. The Special Forces Support Group, under the operational control of the Director of Special Forces, provides operational manoeuvring support to the United Kingdom Special Forces.


Colonial units

The British Army historically included many units from what are now separate
Commonwealth realm A Commonwealth realm is a sovereign state in the Commonwealth of Nations that has the same constitutional monarch and head of state as the other realms. The current monarch is King Charles III. Except for the United Kingdom, in each of the re ...
s. When the English Empire was established in
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
(including Bermuda), and the West Indies in the early 17th century there was no standing English Army, only the
Militia A militia ( ) is a military or paramilitary force that comprises civilian members, as opposed to a professional standing army of regular, full-time military personnel. Militias may be raised in times of need to support regular troops or se ...
, Yeomanry, and Royal bodyguards, of which the Militia, as the primary home-defence force, was immediately extended to the colonies. Colonial militias defended colonies single-handedly at first against indigenous peoples and European competitors. Once the standing English Army, later the British Army, came into existence and began to garrison the colonies, the colonial militias fought side by side with it in a number of wars, including the
Seven Years' War The Seven Years' War, 1756 to 1763, was a Great Power conflict fought primarily in Europe, with significant subsidiary campaigns in North America and South Asia. The protagonists were Kingdom of Great Britain, Great Britain and Kingdom of Prus ...
. Some of the colonial militias rebelled during the American War of Independence. The militia fought alongside the regular British Army (and native allies) in defending British North America from their former countrymen during the
War of 1812 The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the Uni ...
. Locally raised units in strategically located
Imperial fortress Robert Gascoyne-Cecil, 3rd Marquess of Salisbury, Lord Salisbury described Malta, Gibraltar, Bermuda, and Halifax as Imperial fortresses at the 1887 Colonial Conference, though by that point they had been so designated for decades. Later histor ...
colonies (including:
Nova Scotia Nova Scotia is a Provinces and territories of Canada, province of Canada, located on its east coast. It is one of the three Maritime Canada, Maritime provinces and Population of Canada by province and territory, most populous province in Atlan ...
before the
Canadian Confederation Canadian Confederation () was the process by which three British North American provinces—the Province of Canada, Nova Scotia, and New Brunswick—were united into one federation, called the Name of Canada#Adoption of Dominion, Dominion of Ca ...
;
Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...
– which was treated as part of The Maritimes under the Commander-in-Chief at Nova Scotia until Canadian Confederation;
Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...
; and
Malta Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...
) and the
Channel Islands The Channel Islands are an archipelago in the English Channel, off the French coast of Normandy. They are divided into two Crown Dependencies: the Jersey, Bailiwick of Jersey, which is the largest of the islands; and the Bailiwick of Guernsey, ...
were generally maintained from army funds and more fully integrated into the British Army as evident from their placements in British Army lists, unlike units such as the King's African Rifles. The larger colonies (Australia, New Zealand, Canada, South Africa, etc.) mostly achieved Commonwealth Dominion status before or after the First World War and were granted full legislative independence in 1931. While remaining within the British Empire, this placed their governments on a par with the British government, and hence their military units comprised separate armies (e.g. the
Australian Army The Australian Army is the principal Army, land warfare force of Australia. It is a part of the Australian Defence Force (ADF), along with the Royal Australian Navy and the Royal Australian Air Force. The Army is commanded by the Chief of Army ...
), although Canada retained the term "militia" for its military forces until the Second World War. From the 1940s, these dominions and many colonies chose full independence, usually becoming
Commonwealth realm A Commonwealth realm is a sovereign state in the Commonwealth of Nations that has the same constitutional monarch and head of state as the other realms. The current monarch is King Charles III. Except for the United Kingdom, in each of the re ...
s (as member states of the Commonwealth are known today). Units raised in
self-governing Self-governance, self-government, self-sovereignty or self-rule is the ability of a person or group to exercise all necessary functions of regulation without intervention from an external authority. It may refer to personal conduct or to any ...
and Crown colonies (those without local elected
Legislatures A legislature (, ) is a deliberative assembly with the legal authority to make laws for a political entity such as a country, nation or city on behalf of the people therein. They are often contrasted with the executive and judicial powers ...
, as was the case with
British Hong Kong Hong Kong was under British Empire, British rule from 1841 to 1997, except for a Japanese occupation of Hong Kong, brief period of Japanese occupation during World War II from 1941 to 1945. It was a crown colony of the United Kingdom from 1841 ...
) that are part of the British realm remain under British Government control. As the territorial governments are delegated responsibility only for internal government, the UK Government, as the government of the
Sovereign state A sovereign state is a State (polity), state that has the highest authority over a territory. It is commonly understood that Sovereignty#Sovereignty and independence, a sovereign state is independent. When referring to a specific polity, the ter ...
, retains responsibility for national security and the defence of the fourteen remaining
British Overseas Territories The British Overseas Territories (BOTs) or alternatively referred to as the United Kingdom Overseas Territories (UKOTs) are the fourteen dependent territory, territories with a constitutional and historical link with the United Kingdom that, ...
, of which six have locally raised regiments: * Royal Bermuda Regiment * Royal Gibraltar Regiment * Falkland Islands Defence Force *
Royal Montserrat Defence Force The Royal Montserrat Defence Force is the home defence unit of the British Overseas Territories, British Overseas Territory of Montserrat. The force has an authorized strength level objective of 50 reserve personnel as of 2021-22, akin in size ...
* Cayman Islands Regiment * Turks and Caicos Islands Regiment File:Falklandsdf.jpg, alt=Line of soldiers near water, Falkland Islands Defence Force on parade in June 2013 File:Detachment of Falkland Islands Defence Force.jpg, alt=Soldiers marching down a street in black uniforms, Detachment of the Falkland Islands Defence Force in ceremonial dress File:US President JF Kennedy inspects Bermuda Rifles 1961.jpg, John Fitzgerald Kennedy, escorted by Governor and Commander-in-Chief of Bermuda, Major-General Sir JA Gascoigne, KCMG, KCVO, CB, DSO, DL, and Major JA Marsh, DSO, the Officer Commanding the Bermuda Militia Artillery, inspects a Bermuda Rifles guard in 1961, four years before the units amalgamated File:RSM of the Bermuda Regiment 1992.jpg, WO1 Herman Eve, RSM of the Royal Bermuda Regiment in 1992 File:Bermuda Regiment Band.png, Bandsmen of the Royal Bermuda Regiment File:Bermuda Regiment PNCO Cadre Promotion Parade.jpg, alt=Soldiers in white-and-black dress uniforms, Royal Bermuda Regiment on parade File:Changing of the Guard duo - Royal Gibraltar Regiment.jpg, alt=Two soldiers in red dress uniforms, Changing of the guard, Royal Gibraltar Regiment (2012) File:Royal Gibraltar Regiment.jpg, alt=Four soldiers marching in red-and-blue dress uniforms, Royal Gibraltar Regiment in London, April 2012


Levels of Command

The structure of the British Army beneath the level of Divisions and Brigades is also hierarchical and command is based on rank. The table below details how many units within the British Army are structured, although there can be considerable variation between individual units: Whilst many units are organised as Battalions or Regiments administratively, the most common fighting unit is the combined arms unit known as a Battlegroup. This is formed around a combat unit and supported by units (or sub-units) from other capabilities. An example of a battlegroup would be two companies of armoured infantry (e.g. from the 1st Battalion of the Mercian Regiment), one squadron of heavy armour (e.g. A Squadron of the
Royal Tank Regiment The Royal Tank Regiment (RTR) is the oldest tank unit in the world, being formed by the British Army in 1916 during the World War I, First World War. Today, it is an Armoured warfare, armoured regiment equipped with Challenger 2 main battle tanks ...
), a company of engineers (e.g. B Company of the 22nd Engineer Regiment), a Battery of artillery (e.g. D Battery of the 1st Regiment of the Royal Horse Artillery) and smaller attachments from medical, logistic and intelligence units. Typically organised and commanded by a battlegroup headquarters and named after the unit which provided the most combat units, in this example, it would be the 1 Mercian Battlegroup. This creates a self-sustaining mixed formation of armour, infantry, artillery, engineers and support units, commanded by a lieutenant colonel.


Recruitment

The British Army primarily recruits from within the United Kingdom, but accept applications from all British citizens. It also accepts applications from Irish citizens and Commonwealth citizens, with certain restrictions. Since 2018 the British Army has been an equal-opportunity employer (with some legal exceptions due to medical standards), and does not discriminate based on race, religion or sexual orientation. Applicants for the Regular Army must be a minimum age of 16, although soldiers under 18 may not serve in operations, and the maximum age is 36. Applicants for the Army Reserve must be a minimum of 17 years and 9 months, and a maximum age of 43. Different age limits apply for Officers and those in some specialist roles. Applicants must also meet several other requirements, notably regarding medical health, physical fitness, past-criminal convictions, education, and regarding any tattoos and piercings. Soldiers and officers in the Regular Army now enlist for an initial period of 12 years, with options to extend if they meet certain requirements. Soldiers and officers are normally required to serve for a minimum of 4 years from date of enlistment and must give 12 months' notice before leaving; soldiers who joined before the age of 18 years old are normally required to serve for a minimum of 6 years.


Oath of allegiance

All soldiers and commissioned officers must take an oath of allegiance upon joining the Army, a process known as attestation. Those who wish to swear by
God In monotheistic belief systems, God is usually viewed as the supreme being, creator, and principal object of faith. In polytheistic belief systems, a god is "a spirit or being believed to have created, or for controlling some part of the un ...
use the following words: Others replace the words "swear by Almighty God" with "solemnly, sincerely and truly declare and affirm".


Training

Candidates for the Army undergo common training, beginning with initial military training, to bring all personnel to a similar standard in basic military skills, which is known as Phase 1 training. They then undertake further specialist trade-training for their specific Regiment or Corps, known as Phase 2 training. After completing Phase 1 training a soldier is counted against the Army's trained strength, and upon completion of Phase 2 are counted against the Army's fully trained trade strength. Soldiers under the age of 17 and six months will complete Phase 1 training at the Army Foundation College. Infantry Soldiers will complete combined Phase 1 & 2 training at the Infantry Training Centre, Catterick, whilst all other Soldiers will attend Phase 1 training at the Army Training Centre Pirbright or Army Training Regiment, Winchester, and then complete Phase 2 training at different locations depending on their specialism. Officers conduct their initial training at the Royal Military Academy Sandhurst (RMAS), before also completing their Phase 2 training at multiple different locations.


Flags and ensigns

The British Army's official flag is the
Union Jack The Union Jack or Union Flag is the ''de facto'' national flag of the United Kingdom. The Union Jack was also used as the official flag of several British colonies and dominions before they adopted their own national flags. It is sometimes a ...
. The Army also has a non-ceremonial flag that is often seen flying from military buildings and is used at recruiting and military events and exhibitions. Traditionally most British Army units had a set of flags, known as the colours—normally a Regimental Colour and a King's Colour (the Union Jack). Historically these were carried into battle as a rallying point for the soldiers and were closely guarded. In modern units the colours are often prominently displayed, decorated with battle honours, and act as a focal point for Regimental pride. A soldier re-joining a regiment (upon recall from the reserve) is described as ''re-called to the Colours''. File:Flag of the United Kingdom.svg, alt=Union Jack, Official Army flag File:Flag of the British Army.svg, alt=The British Lion, the crown and crossed swords on a red background, Non-ceremonial army flag; "Army", in gold letters, sometimes appears below the badge. File:British Army Ensign01.svg, alt=Flag with Union Jack and crossed swords on a blue background,
Ensign Ensign most often refers to: * Ensign (flag), a flag flown on a vessel to indicate nationality * Ensign (rank), a navy (and former army) officer rank Ensign or The Ensign may also refer to: Places * Ensign, Alberta, Alberta, Canada * Ensign, Ka ...
for general use by the Royal Logistic Corps File:British Army Ensign00.svg, alt=Same as previous flag, with the British lion and the crown, Ensign flown by the Royal Logistic Corps from vessels commanded by commissioned officers File:Royal Engineers Ensign.png, alt=Union Jack and stylised, winged hand on a blue background, Ensign of the Corps of
Royal Engineers The Corps of Royal Engineers, usually called the Royal Engineers (RE), and commonly known as the ''Sappers'', is the engineering arm of the British Army. It provides military engineering and other technical support to the British Armed Forces ...


Ranks and insignia

Most ranks across the British Army are known by the same name regardless of which Regiment they are in. However, the Household Cavalry call many ranks by different names, the
Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
refer to Corporals as Bombardiers, the Rifles spell Sergeant as Serjeant, and Private soldiers are known by a wide variety of titles; notably trooper, gunner, guardsman, kingsman, sapper, signaller, fusilier, craftsman and rifleman dependant on the Regiment they belong to. These names do not affect a soldier's pay or role.


Reserve forces

The oldest of the Reserve Forces was the Militia Force (also referred to as the ''Constitutional Force''), which (in the
Kingdom of England The Kingdom of England was a sovereign state on the island of Great Britain from the late 9th century, when it was unified from various Heptarchy, Anglo-Saxon kingdoms, until 1 May 1707, when it united with Kingdom of Scotland, Scotland to f ...
, prior to 1707) was originally the main military defensive force (until the 1645 creation of the New Model Army, there otherwise were originally only Royal bodyguards, including the Yeomen Warders and the Yeomen of the Guard, with armies raised only temporarily for expeditions overseas), made up of civilians embodied for annual training or emergencies, which had used various schemes of compulsory service during different periods of its long existence. From the 1850s it recruited volunteers who engaged for terms of service. The Militia was originally an all-infantry force, though Militia coastal artillery, field artillery, and engineers units were introduced from the 1850s.''The Militia Artillery 1852–1909'', by Norman EH Litchfield. The Sherwood Press (Nottingham) Ltd. 1987 Volunteer Force units were also frequently raised during wartime and disbanded upon peace. This was re-established as a permanent (i.e., in war and peace) part of the Reserve Forces in 1859. It differed from the Militia in a number of ways, most particularly in that volunteers did not commit to a term service, and were able to resign with fourteen days notice (except while embodied). As volunteer soldiers were originally expected to fund the cost of their own equipment, few tended to come from the labouring class among whom the Militia primarily recruited. The Yeomanry Force was made up of mounted units, organised similarly to the Volunteer Force, first raised during the two decades of war with France that followed the French Revolution. As with the Volunteers, members of the Yeomanry were expected to foot much of the cost of their own equipment, including their horses, and the make-up of the units tended to be from more affluent classes. Although Militia regiments were linked with British Army regiments during the course of the Napoleonic Wars to feed volunteers for service abroad into the regular army, and volunteers from the Reserve Forces served abroad either individually or in contingents, service companies, or battalions in a succession of conflicts from the
Crimean War The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
to the
Second Boer War The Second Boer War (, , 11 October 189931 May 1902), also known as the Boer War, Transvaal War, Anglo–Boer War, or South African War, was a conflict fought between the British Empire and the two Boer republics (the South African Republic and ...
, personnel did not normally move between forces unless re-attested as a member of the new force, and units did not normally move from the Reserve Forces to become part of the Regular Forces, or vice versa. There were exceptions, however, as with the ''New Brunswick Regiment of Fencible Infantry'', raised in 1803, which became the 104th (New Brunswick) Regiment of Foot when it was transferred to the British Army on 13 September 1810. Another type of reserve force was created during the period between the French Revolution and the end of the Napoleonic Wars. Called Fencibles, these were disbanded after the Napoleonic Wars and not raised again, although the Royal Malta Fencible Regiment, later the ''Royal Malta Fencible Artillery'', existed from 1815 until the 1880s when it became the Royal Malta Artillery, and the Royal New Zealand Fencible Corps was formed in 1846. The Reserve Forces were raised locally (in Britain, under the control of Lords-Lieutenant of counties, and, in British colonies, under the colonial governors, and members originally were obliged to serve only within their locality (which, in the United Kingdom, originally meant within the county or other recruitment area, but was extended to anywhere in Britain, though not overseas). They have consequently also been referred to as ''Local Forces''. As they were (and in some cases ''are'') considered separate forces from the British Army, though still within the British military, they have also been known as ''Auxiliary Forces''. The Militia and Volunteer units of a colony were generally considered to be separate forces from the ''Home'' Militia Force and Volunteer Force in the United Kingdom, and from the Militia Forces and Volunteer Forces of other colonies. Where a colony had more than one Militia or Volunteer unit, they would be grouped as a Militia or Volunteer Force for that colony, such as the Jamaica Volunteer Defence Force. Officers of the Reserve Forces could not sit on Courts Martial of regular forces personnel. The Mutiny Act did not apply to members of the Reserve Forces. The ''Reserve Forces'' within the British Isles were increasingly integrated with the British Army through a succession of reforms (beginning with the Cardwell Reforms) of the British military forces over the last two decades of the Nineteenth Century and the early years of the Twentieth Century, whereby the Reserve Forces units mostly lost their own identities and became numbered Militia or Volunteer battalions of regular British Army corps or regiments. In 1908, the Yeomanry and Volunteer Force were merged to create the Territorial Force (changed to ''Territorial Army'' after the First World War), with terms of service similar to the army and Militia, and the Militia was renamed the ''Special Reserve'', After the First World War the Special Reserve was renamed the Militia, again, but permanently suspended (although a handful of Militia units survived in the United Kingdom, its colonies, and the Crown Dependencies). Although the Territorial Force was nominally still a separate force from the British Army, by the end of the century, at the latest, any unit wholly or partly funded from Army Funds was considered part of the British Army. Outside the United Kingdom-proper, this was generally only the case for those units in the
Channel Islands The Channel Islands are an archipelago in the English Channel, off the French coast of Normandy. They are divided into two Crown Dependencies: the Jersey, Bailiwick of Jersey, which is the largest of the islands; and the Bailiwick of Guernsey, ...
or the
Imperial fortress Robert Gascoyne-Cecil, 3rd Marquess of Salisbury, Lord Salisbury described Malta, Gibraltar, Bermuda, and Halifax as Imperial fortresses at the 1887 Colonial Conference, though by that point they had been so designated for decades. Later histor ...
colonies (
Nova Scotia Nova Scotia is a Provinces and territories of Canada, province of Canada, located on its east coast. It is one of the three Maritime Canada, Maritime provinces and Population of Canada by province and territory, most populous province in Atlan ...
, before
Canadian confederation Canadian Confederation () was the process by which three British North American provinces—the Province of Canada, Nova Scotia, and New Brunswick—were united into one federation, called the Name of Canada#Adoption of Dominion, Dominion of Ca ...
;
Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...
;
Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...
; and
Malta Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...
). The Bermuda Militia Artillery, Bermuda Militia Infantry, Bermuda Volunteer Engineers, and the Bermuda Volunteer Rifle Corps, by example were paid for by the War Office and considered part of the British Army, with their officers appearing as such in the ''Army List'' unlike those of many other colonial units deemed auxiliaries. Today, the British Army is the only Home British military force, including the various other forces it has absorbed, though British military units organised on Territorial Army lines remain in British Overseas Territories that are still not considered formally part of the British Army, with only the Royal Gibraltar Regiment and the Royal Bermuda Regiment (an amalgam of the old Bermuda Militia Artillery and Bermuda Volunteer Rifle Corps) appearing on the British Army order-of-precedence and in the Army List, as well as on the Corps Warrant (the official list of those British military forces that are considered corps of the British Army). In October 2012 the Ministry of Defence announced that the Territorial Army was to be renamed the Army Reserve.


Uniforms

The British Army uniform has sixteen categories, ranging from ceremonial uniforms to combat dress to evening wear. No. 8 Dress, the day-to-day uniform, is known as "Personal Clothing System – Combat Uniform" (PCS-CU) and consists of a Multi-Terrain Pattern (MTP) windproof smock, a lightweight jacket and trousers with ancillary items such as thermals and waterproofs. The army has introduced
tactical recognition flash Tactical recognition flash (TRF) is the British military term for a coloured patch worn on the right arm of combat clothing by members of the British Army, Royal Navy and Royal Air Force. A TRF serves to quickly Combat identification, identify th ...
es (TRFs); worn on the right arm of a combat uniform, the insignia denotes the wearer's regiment or corps. In addition to working dress, the army has a number of parade uniforms for ceremonial and non-ceremonial occasions. The most-commonly-seen uniforms are No. 1 Dress (full ceremonial, seen at formal occasions such as at the changing of the guard at Buckingham Palace) and No. 2 Dress (Service Dress), a brown khaki uniform worn for non-ceremonial parades. Working headdress is typically a beret, whose colour indicates its wearer's type of regiment. Beret colours are: * Khaki— Foot Guards, Honourable Artillery Company, Princess of Wales's Royal Regiment, Royal Anglian Regiment, Royal Welsh, Royal Yorkshire Regiment * Light grey— Royal Scots Dragoon Guards * Brown— King's Royal Hussars, Royal Wessex Yeomanry * Black—
Royal Tank Regiment The Royal Tank Regiment (RTR) is the oldest tank unit in the world, being formed by the British Army in 1916 during the World War I, First World War. Today, it is an Armoured warfare, armoured regiment equipped with Challenger 2 main battle tanks ...
* Dark (
rifle A rifle is a long gun, long-barreled firearm designed for accurate shooting and higher stopping power, with a gun barrel, barrel that has a helical or spiralling pattern of grooves (rifling) cut into the bore wall. In keeping with their focus o ...
) green—Royal Dragoon Guards, The Rifles, Royal Gurkha Rifles, Small Arms School Corps * Maroon beret, Maroon—Parachute Regiment (United Kingdom), Parachute Regiment * Beige—
Special Air Service The Special Air Service (SAS) is a special forces unit of the British Army. It was founded as a regiment in 1941 by David Stirling, and in 1950 it was reconstituted as a corps. The unit specialises in a number of roles including counter-terr ...
* Sky blue—Army Air Corps (United Kingdom), Army Air Corps * Cypress green—Intelligence Corps (United Kingdom), Intelligence Corps * Scarlet—Royal Military Police * Green—Adjutant General's Corps * Navy blue—All other units, such as the Household Cavalry, Light Dragoons, Queen's Dragoon Guards, Royal Yeomanry, and the Royal Regiment of Fusiliers * Emerald grey— Special Reconnaissance Regiment * Gun-metal grey—Ranger Regiment (United Kingdom), The Ranger Regiment


See also

* Army 2020 Refine * Army Cadet Force * Army Reserve (United Kingdom) * British Army order of precedence * British campaign medals * Corps Warrant * List of British Army installations * List of British Army regiments and corps * List of equipment of the British Army * List of military weapons of the United Kingdom * List of roles in the British Army * List of wars involving England * List of wars involving Scotland * List of wars involving the United Kingdom * Military bands of the United Kingdom * Military history of the United Kingdom * Ministry of Defence (United Kingdom) * Red coat (military uniform) *
Royal Air Force The Royal Air Force (RAF) is the Air force, air and space force of the United Kingdom, British Overseas Territories and Crown Dependencies. It was formed towards the end of the World War I, First World War on 1 April 1918, on the merger of t ...
*
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
* "Rule, Britannia!" * Strategic Defence and Security Review 2015 * Tommy Atkins * Uniforms of the British Army * United Kingdom Special Forces


Notes


References


Bibliography

* * * * * * * * * * * * French, David. ''Army, Empire, and Cold War: The British Army and Military Policy, 1945–1971'' (2012) * * * * * Linch, Kevin, and Matthew Lord, eds. ''Redcoats to Tommies: The Experience of the British Soldier from the Eighteenth Century'' (Boydell Press, 2021
Online review of this book.
* * * * * * * * * * * * * * * * * *


External links

* {{Authority control British Army, 1707 establishments in Great Britain British Armed Forces, Army Ministry of Defence (United Kingdom) Military of the United Kingdom Organizations established in 1707