A military, also known collectively as armed forces, is a heavily
armed, highly organized force primarily intended for
warfare
War is an armed conflict between the armed forces of State (polity), states, or between governmental forces and armed groups that are organized under a certain command structure and have the capacity to sustain military operations, or betwe ...
. Militaries are typically authorized and maintained by a
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 ...
, with their members identifiable by a distinct
military uniform. They may consist of one or more
military branches such as an
army
An army, ground force or land force is an armed force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or country. It may also include aviation assets by ...
,
navy
A navy, naval force, military maritime fleet, war navy, or maritime force is the military branch, branch of a nation's armed forces principally designated for naval warfare, naval and amphibious warfare; namely, lake-borne, riverine, littoral z ...
,
air force
An air force in the broadest sense is the national military branch that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army aviati ...
,
space force,
marines
Marines (or naval infantry) are military personnel generally trained to operate on both land and sea, with a particular focus on amphibious warfare. Historically, the main tasks undertaken by marines have included Raid (military), raiding ashor ...
, or
coast guard. The main task of a military is usually defined as defence of their state and its interests against external armed threats.
In broad usage, the terms "armed forces" and "military" are often synonymous, although in technical usage a distinction is sometimes made in which a country's armed forces may include other
paramilitary
A paramilitary is a military that is not a part of a country's official or legitimate armed forces. The Oxford English Dictionary traces the use of the term "paramilitary" as far back as 1934.
Overview
Though a paramilitary is, by definiti ...
forces such as armed police.

Beyond warfare, the military may be employed in additional sanctioned and non-sanctioned functions within the state, including internal security threats,
crowd control, promotion of
political agenda
In politics, a political agenda is a list of subjects or problems (issues) to which government officials as well as individuals outside the government are paying serious attention to at any given time. The political agenda is most often shaped by ...
s,
emergency services and reconstruction, protecting
corporate
A corporation or body corporate is an individual or a group of people, such as an association or company, that has been authorized by the state to act as a single entity (a legal entity recognized by private and public law as "born out of s ...
economic interests, social ceremonies, and national
honour guards.
A nation's military may function as a discrete social
subculture, with dedicated infrastructure such as military housing,
schools, utilities,
logistics
Logistics is the part of supply chain management that deals with the efficient forward and reverse flow of goods, services, and related information from the point of origin to the Consumption (economics), point of consumption according to the ...
,
hospitals, legal services, food production, finance, and banking services.
The profession of
soldier
A soldier is a person who is a member of an army. A soldier can be a Conscription, conscripted or volunteer Enlisted rank, enlisted person, a non-commissioned officer, a warrant officer, or an Officer (armed forces), officer.
Etymology
The wo ...
ing is older than
recorded history
Recorded history or written history describes the historical events that have been recorded in a written form or other documented communication which are subsequently evaluated by historians using the historical method. For broader world h ...
. Some images of
classical antiquity
Classical antiquity, also known as the classical era, classical period, classical age, or simply antiquity, is the period of cultural History of Europe, European history between the 8th century BC and the 5th century AD comprising the inter ...
portray the power and feats of military
leaders. The
Battle of Kadesh
The Battle of Kadesh took place in the 13th century BC between the New Kingdom of Egypt, Egyptian Empire led by pharaoh Ramesses II and the Hittites, Hittite Empire led by king Muwatalli II. Their armies engaged each other at the Orontes River, ...
in 1274 BC from the reign of
Ramses II, features in
bas-relief monuments. The first
Emperor of a unified China,
Qin Shi Huang, created the
Terracotta Army to represent his military might.
[
Terra cotta of massed ranks of Qin Shi Huang's terra cotta soldiers
]
The
Ancient Romans
The Roman people was the ethnicity and the body of Roman citizenship, Roman citizens
(; ) during the Roman Kingdom, the Roman Republic, and the Roman Empire. This concept underwent considerable changes throughout the long history of the Roman ...
wrote many
treatises and writings on warfare, as well as many decorated
triumphal arch
A triumphal arch is a free-standing monumental structure in the shape of an archway with one or more arched passageways, often designed to span a road, and usually standing alone, unconnected to other buildings. In its simplest form, a triumphal ...
es and
victory columns.
Etymology and definitions
The first recorded use of the word "military" in English, spelled , was in 1582.
It comes from the Latin (from Latin ) through French, but is of uncertain etymology, one suggestion being derived from ''*mil-it-'' – going in a body or mass.
As a noun phrase, "the military" usually refers generally to a country's armed forces, or sometimes, more specifically, to the senior officers who command them.
In general, it refers to the physicality of armed forces, their
personnel,
equipment
Equipment most commonly refers to a set of tool
A tool is an Physical object, object that can extend an individual's ability to modify features of the surrounding environment or help them accomplish a particular task. Although many Tool use by ...
, and the physical area which they occupy.
As an adjective, military originally referred only to soldiers and soldiering, but it broadened to apply to land forces in general, and anything to do with their profession.
The names of both the
Royal Military Academy (1741) and
United States Military Academy (1802) reflect this. However, at about the time of 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 ...
, ''military'' began to be used in reference to armed forces as a whole, such as "
military service
Military service is service by an individual or group in an army or other militia, air forces, and naval forces, whether as a chosen job (volunteer military, volunteer) or as a result of an involuntary draft (conscription).
Few nations, such ...
", "
military intelligence
Military intelligence is a military discipline that uses information collection and analysis List of intelligence gathering disciplines, approaches to provide guidance and direction to assist Commanding officer, commanders in decision making pr ...
", and "
military history
Military history is the study of War, armed conflict in the Human history, history of humanity, and its impact on the societies, cultures and economies thereof, as well as the resulting changes to Politics, local and international relationship ...
". As such, it now connotes any activity performed by armed force personnel.
History
Military history is often considered to be the history of all conflicts, not just the history of the state militaries. It differs somewhat from the
history of war, with military history focusing on the people and institutions of war-making, while the history of war focuses on the evolution of war itself in the face of changing technology, governments, and geography.
Military history has a number of facets. One main facet is to learn from past accomplishments and mistakes, so as to more effectively wage war in the future. Another is to create a sense of
military tradition, which is used to create cohesive military forces. Still, another is to learn to prevent wars more effectively. Human knowledge about the military is largely based on both recorded and
oral history
Oral history is the collection and study of historical information from
people, families, important events, or everyday life using audiotapes, videotapes, or transcriptions of planned interviews. These interviews are conducted with people who pa ...
of military conflicts (war), their participating
armies and
navies and, more recently,
air force
An air force in the broadest sense is the national military branch that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army aviati ...
s.
Organization
Personnel and units
Despite the growing importance of
military technology
Military technology is the application of technology for use in warfare. It comprises the kinds of technology that are distinctly military in nature and not civilian in application, usually because they lack useful or legal civilian application ...
, military activity depends above all on people. For example, in 2000 the British Army declared: "Man is still the first weapon of war."
Rank and role
The military organization is characterized by a
command hierarchy divided by
military rank
Military ranks is a system of hierarchy, hierarchical relationships within armed forces, police, Intelligence agency, intelligence agencies, paramilitary groups, and other institutions organized along military organisation , military lines, such ...
, with ranks normally grouped (in descending order of authority) as
officers (e.g.
colonel
Colonel ( ; abbreviated as Col., Col, or COL) is a senior military Officer (armed forces), officer rank used in many countries. It is also used in some police forces and paramilitary organizations.
In the 17th, 18th, and 19th centuries, a colon ...
),
non-commissioned officer
A non-commissioned officer (NCO) is an enlisted rank, enlisted leader, petty officer, or in some cases warrant officer, who does not hold a Commission (document), commission. Non-commissioned officers usually earn their position of authority b ...
s (e.g.
sergeant
Sergeant (Sgt) is a Military rank, rank in use by the armed forces of many countries. It is also a police rank in some police services. The alternative spelling, ''serjeant'', is used in The Rifles and in other units that draw their heritage f ...
), and personnel at the lowest rank (e.g.
private). While senior officers make strategic decisions, subordinated military personnel (
soldier
A soldier is a person who is a member of an army. A soldier can be a Conscription, conscripted or volunteer Enlisted rank, enlisted person, a non-commissioned officer, a warrant officer, or an Officer (armed forces), officer.
Etymology
The wo ...
s,
sailors,
marines
Marines (or naval infantry) are military personnel generally trained to operate on both land and sea, with a particular focus on amphibious warfare. Historically, the main tasks undertaken by marines have included Raid (military), raiding ashor ...
, or
airmen) fulfil them. Although rank titles vary by
military branch and country, the rank hierarchy is common to all state armed forces worldwide.
In addition to their rank, personnel occupy one of many trade roles, which are often grouped according to the nature of the role's military tasks on combat operations:
combat
Combat (French language, French for ''fight'') is a purposeful violent Conflict (process), conflict between multiple combatants with the intent to harm the opposition. Combat may be armed (using weapons) or unarmed (Hand-to-hand combat, not usin ...
roles (e.g.
infantry
Infantry, or infantryman are a type of soldier who specialize in ground combat, typically fighting dismounted. Historically the term was used to describe foot soldiers, i.e. those who march and fight on foot. In modern usage, the term broadl ...
),
combat support roles (e.g.
combat engineers), and
combat service support roles (e.g.
logistical support).
Recruitment
Personnel may be
recruited or
conscripted, depending on the system chosen by the state. Most military personnel are males; the minority proportion of female personnel varies internationally (approximately 3% in India, 10% in the UK, 13% in Sweden, 16% in the US, and 27% in South Africa). While two-thirds of states now recruit or conscript only adults, as of 2017 50 states still relied partly on children under the age of 18 (usually aged 16 or 17) to staff their armed forces.
Whereas recruits who join as
officers tend to be
upwardly-mobile,
most enlisted personnel have a childhood background of relative
socio-economic deprivation.
[Brett, Rachel, and Irma Specht. ''Young Soldiers: Why They Choose to Fight''. Boulder: Lynne Rienner Publishers, 2004. ] For example, after the US suspended conscription in 1973, "the military disproportionately attracted African American men, men from lower-status socioeconomic backgrounds, men who had been in nonacademic high school programs, and men whose high school grades tended to be low".
However, a study released in 2020 on the socio-economic backgrounds of U.S. Armed Forces personnel suggests that they are at parity or slightly higher than the civilian population with respect to socio-economic indicators such as parental income, parental wealth and cognitive abilities. The study found that technological, tactical, operational and doctrinal changes have led to a change in the demand for personnel. Furthermore, the study suggests that the most disadvantaged socio-economic groups are less likely to meet the requirements of the modern U.S. military.
Obligations
The obligations of military employment are many. Full-time military employment normally requires a minimum period of service of several years; between two and six years is typical of armed forces in Australia, the UK and the US, for example, depending on role, branch, and rank.
Some armed forces allow a short
discharge window, normally during training, when recruits may leave the armed force as of right.
Alternatively, part-time military employment, known as
reserve service, allows a recruit to maintain a civilian job while training under military discipline at weekends; he or she may be called out to
deploy on operations to supplement the full-time personnel complement. After leaving the armed forces, recruits may remain liable for compulsory return to full-time military employment in order to train or
deploy on operations.
Military law introduces offences not recognized by civilian courts, such as
absence without leave (AWOL), desertion, political acts,
malingering, behaving disrespectfully, and disobedience (see, for example,
offences against military law in the United Kingdom).
Penalties range from a summary
reprimand to imprisonment for several years following a
court martial
A court-martial (plural ''courts-martial'' or ''courts martial'', as "martial" is a postpositive adjective) is a military court or a trial conducted in such a court. A court-martial is empowered to determine the guilt of members of the mili ...
.
Certain rights are also restricted or suspended, including the freedom of association (e.g. union organizing) and freedom of speech (speaking to the media).
Military personnel in some countries have a right of
conscientious objection if they believe an order is immoral or unlawful, or cannot in good conscience carry it out.
Personnel may be posted to bases in their home country or overseas, according to operational need, and may be deployed from those bases on
exercises or
operations. During peacetime, when military personnel are generally stationed in
garrison
A garrison is any body of troops stationed in a particular location, originally to guard it. The term now often applies to certain facilities that constitute a military base or fortified military headquarters.
A garrison is usually in a city ...
s or other permanent military facilities, they conduct administrative tasks,
training and
education
Education is the transmission of knowledge and skills and the development of character traits. Formal education occurs within a structured institutional framework, such as public schools, following a curriculum. Non-formal education als ...
activities,
technology maintenance,
and recruitment.
Training
Initial training conditions recruits for the demands of military life, including preparedness to injure and kill other people, and to face mortal danger without fleeing. It is a physically and psychologically intensive process which
resocializes recruits for the unique nature of military demands. For example:
* Individuality is suppressed (e.g. by shaving the head of new recruits, issuing uniforms, denying privacy, and prohibiting the use of first names);
* Daily routine is tightly controlled (e.g. recruits must make their beds, polish boots, and stack their clothes in a certain way, and mistakes are punished);
* Continuous
stressors deplete psychological resistance to the demands of their instructors (e.g. depriving recruits of sleep, food, or shelter, shouting insults and giving orders intended to humiliate)
* Frequent punishments serve to condition group conformity and discourage poor performance;
* The disciplined drill instructor is presented as a role model of the ideal soldier.
Intelligence
The next requirement comes as a fairly basic need for the military to identify possible
threats it may be called upon to face. For this purpose, some of the commanding forces and other military, as well as often civilian personnel participate in identification of these threats. This is at once an organization, a system and a process collectively called
military intelligence
Military intelligence is a military discipline that uses information collection and analysis List of intelligence gathering disciplines, approaches to provide guidance and direction to assist Commanding officer, commanders in decision making pr ...
(MI). Areas of study in Military intelligence may include the operational environment, hostile, friendly and neutral forces, the civilian population in an area of combat operations, and other broader areas of interest.
The difficulty in using military intelligence concepts and military intelligence methods is in the nature of the
secrecy of the information they seek, and the
clandestine nature that intelligence operatives work in obtaining what may be plans for a
conflict escalation,
initiation of combat, or an
invasion.
An important part of the military intelligence role is the military analysis performed to assess
military capability
Military capability is defined by the Australian Defence Force as "the ability to achieve a desired effect in a specific operating environment". It is defined by three interdependent factors: combat readiness, sustainable capability and force struc ...
of potential future aggressors, and provide combat modelling that helps to understand factors on which comparison of forces can be made. This helps to quantify and qualify such statements as: "
China
China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...
and
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 ...
maintain the largest armed forces in the World" or that "the
U.S. Military is considered to be the world's strongest".

Although some groups engaged in combat, such as militants or
resistance movements, refer to themselves using military terminology, notably 'Army' or 'Front', none have had the structure of a national military to justify the reference, and usually have had to rely on support of outside national militaries. They also use these terms to conceal from the MI their true capabilities, and to impress potential ideological recruits.
Having military intelligence representatives participate in the execution of the national defence policy is important, because it becomes the first respondent and commentator on the policy expected
strategic goal, compared to the realities of
identified threats. When the intelligence reporting is compared to the policy, it becomes possible for the national leadership to consider allocating resources over and above the officers and their subordinates military pay, and the expense of maintaining military facilities and military support services for them.
Budget
Defense economics is the financial and monetary efforts made to resource and sustain militaries, and to finance
military operations, including war.
The process of allocating resources is conducted by determining a
military budget, which is administered by a military finance organization within the military. Military procurement is then authorized to purchase or contract provision of goods and services to the military, whether in peacetime at a permanent base, or in a combat zone from local population.
File:Military Expenditures by Country 2019.svg, A pie chart showing global military expenditures by country for 2019, in US$ billions, according to SIPRI
File:Military Expenditures as percent of GDP 2017.png, Map of military expenditures as a percentage of GDP by country, 2017
File:U.S - China - Russia, Military Spending.svg, History of military budgets by country
Capability development
Capability development, which is often referred to as the military 'strength', is arguably one of the most complex activities known to humanity; because it requires determining: strategic, operational, and tactical capability requirements to counter the identified threats; strategic,
operational, and tactical doctrines by which the acquired capabilities will be used; identifying concepts, methods, and systems involved in executing the doctrines; creating design specifications for the manufacturers who would produce these in adequate quantity and quality for their use in combat; purchase the concepts, methods, and systems; create a forces structure that would use the concepts, methods, and systems most effectively and efficiently; integrate these concepts, methods, and systems into the force structure by providing
military education,
training, and
practice that preferably resembles combat environment of intended use; create
military logistics
Military logistics is the discipline of planning and carrying out the movement, supply, and maintenance of military forces. In its most comprehensive sense, it is those aspects or military operations that deal with:
* Design, development, Milita ...
systems to allow continued and uninterrupted performance of
military organization
Military organization (American English , AE) or military organisation (British English , BE) is the structuring of the armed forces of a State (polity), state so as to offer such military capability as a military policy, national defense pol ...
s under combat conditions, including provision of health services to the personnel, and maintenance for the equipment; the services to assist recovery of wounded personnel, and repair of damaged equipment; and finally, post-conflict
demobilization, and disposal of war stocks surplus to peacetime requirements.
Development of
military doctrine is perhaps the most important of all capability development activities, because it determines how military forces are used in conflicts, the concepts and methods used by the command to employ appropriately military skilled,
armed and
equipped personnel in achievement of the tangible goals and objectives of the
war,
campaign,
battle
A battle is an occurrence of combat in warfare between opposing military units of any number or size. A war usually consists of multiple battles. In general, a battle is a military engagement that is well defined in duration, area, and force co ...
, engagement, and action.
[Dupuy, T.N. (1990) ''Understanding war: History and Theory of combat'', Leo Cooper, London, p. 67] The line between strategy and tactics is not easily blurred, although deciding which is being discussed had sometimes been a matter of personal judgement by some commentators, and military historians. The use of forces at the level of organization between strategic and tactical is called
operational mobility
In the field of military theory, the operational level of war (also called operational art, as derived from , or operational warfare) represents the level of command that connects the details of tactics with the goals of strategy.
In U.S. ...
.
Science

Because most of the concepts and methods used by the military, and many of its systems are not found in commercial branches, much of the material is researched, designed, developed, and offered for inclusion in
arsenals by
military science
Military science is the study of military processes, institutions, and behavior, along with the study of warfare, and the theory and application of organized coercive force. It is mainly focused on theory, method, and practice of producing mi ...
organizations within the overall structure of the military. Therefore, military scientists can be found interacting with all Arms and Services of the armed forces, and at all levels of the military hierarchy of command.
Although concerned with research into
military psychology, particularly
combat stress and how it affects troop
morale, often the bulk of military science activities is directed at military intelligence technology,
military communications, and improving
military capability
Military capability is defined by the Australian Defence Force as "the ability to achieve a desired effect in a specific operating environment". It is defined by three interdependent factors: combat readiness, sustainable capability and force struc ...
through research. The design, development, and prototyping of
weapon
A weapon, arm, or armament is any implement or device that is used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime (e.g., murder), law ...
s, military support equipment, and
military technology
Military technology is the application of technology for use in warfare. It comprises the kinds of technology that are distinctly military in nature and not civilian in application, usually because they lack useful or legal civilian application ...
in general, is also an area in which much effort is invested – it includes everything from global communication networks and
aircraft carrier
An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and hangar facilities for supporting, arming, deploying and recovering carrier-based aircraft, shipborne aircraft. Typically it is the ...
s to paint and food.
Logistics

Possessing military capability is not sufficient if this capability cannot be deployed for, and employed in combat operations. To achieve this,
military logistics
Military logistics is the discipline of planning and carrying out the movement, supply, and maintenance of military forces. In its most comprehensive sense, it is those aspects or military operations that deal with:
* Design, development, Milita ...
are used for the
logistics management and logistics planning of the forces
military supply chain management, the consumables, and capital equipment of the troops.
Although mostly concerned with the
military transport, as a means of delivery using different modes of transport; from
military trucks, to
container ships operating from permanent
military base
A military base is a facility directly owned and operated by or for the military or one of its branches that shelters military equipment and personnel, and facilitates training and operations. A military base always provides accommodations for ...
, it also involves creating field supply dumps at the rear of the
combat
Combat (French language, French for ''fight'') is a purposeful violent Conflict (process), conflict between multiple combatants with the intent to harm the opposition. Combat may be armed (using weapons) or unarmed (Hand-to-hand combat, not usin ...
zone, and even forward supply points in a specific unit's
tactical area of responsibility.
These supply points are also used to provide
military engineering services, such as the recovery of defective and derelict vehicles and weapons, maintenance of weapons in the field, the repair and field modification of weapons and equipment; and in peacetime, the life-extension programmes undertaken to allow continued use of equipment. One of the most important role of logistics is the supply of
munitions as a primary type of consumable, their storage, and
disposal.
In combat
The primary reason for the existence of the military is to engage in
combat
Combat (French language, French for ''fight'') is a purposeful violent Conflict (process), conflict between multiple combatants with the intent to harm the opposition. Combat may be armed (using weapons) or unarmed (Hand-to-hand combat, not usin ...
, should it be required to do so by the national defence policy, and to win. This represents an organisational goal of any military, and the primary focus for military thought through
military history
Military history is the study of War, armed conflict in the Human history, history of humanity, and its impact on the societies, cultures and economies thereof, as well as the resulting changes to Politics, local and international relationship ...
. How
victory
The term victory (from ) originally applied to warfare, and denotes success achieved in personal duel, combat, after military operations in general or, by extension, in any competition. Success in a military campaign constitutes a strategic vi ...
is achieved, and what shape it assumes, is studied by most, if not all, military groups on three levels.
Strategic victory
Military strategy
Military strategy is a set of ideas implemented by military organizations to pursue desired Strategic goal (military), strategic goals. Derived from the Greek language, Greek word ''strategos'', the term strategy, when first used during the 18th ...
is the management of forces in
wars and
military campaign
A military campaign is large-scale long-duration significant military strategy plan incorporating a series of interrelated military operations or battles forming a distinct part of a larger conflict often called a war. The term derives from th ...
s by a
commander-in-chief, employing large military forces, either national and allied as a whole, or the component elements of
armies,
navies and
air force
An air force in the broadest sense is the national military branch that primarily conducts aerial warfare. More specifically, it is the branch of a nation's armed services that is responsible for aerial warfare as distinct from an army aviati ...
s; such as
army group
An army group is a military organization consisting of several field army, field armies, which is self-sufficient for indefinite periods. It is usually responsible for a particular geographic area. An army group is the largest field organizatio ...
s,
naval fleet
A fleet or naval fleet is a large formation of warships – the largest formation in any navy – controlled by one leader. A fleet at sea is the direct equivalent of an army on land.
Purpose
In the modern sense, fleets are usually, but no ...
s, and large numbers of
aircraft
An aircraft ( aircraft) is a vehicle that is able to flight, fly by gaining support from the Atmosphere of Earth, air. It counters the force of gravity by using either Buoyancy, static lift or the Lift (force), dynamic lift of an airfoil, or, i ...
. Military strategy is a long-term projection of belligerents' policy, with a broad view of outcome implications, including outside the concerns of military command. Military strategy is more concerned with the
supply of war and planning, than management of field forces and combat between them. The scope of strategic military planning can span weeks, but is more often months or even years.
Operational victory
Operational mobility
In the field of military theory, the operational level of war (also called operational art, as derived from , or operational warfare) represents the level of command that connects the details of tactics with the goals of strategy.
In U.S. ...
is, within
warfare and
military doctrine, the level of command which coordinates the minute details of
tactics with the overarching goals of
strategy
Strategy (from Greek στρατηγία ''stratēgia'', "troop leadership; office of general, command, generalship") is a general plan to achieve one or more long-term or overall goals under conditions of uncertainty. In the sense of the " a ...
. A common synonym is operational art.
The operational level is at a scale bigger than one where line of sight and the time of day are important, and smaller than the strategic level, where production and politics are considerations. Formations are of the operational level if they are able to conduct operations on their own, and are of sufficient size to be directly handled or have a significant impact at the strategic level. This concept was pioneered by the
German army prior to and during 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 ...
. At this level, planning and duration of activities takes from one week to a month, and are executed by
Field Armies and
Army Corps and their naval and air equivalents.
Tactical victory
Military tactics concerns itself with the methods for engaging and defeating the enemy in direct combat. Military tactics are usually used by units over hours or days, and are focused on the specific tasks and objectives of
squadrons,
companies
A company, abbreviated as co., is a legal entity representing an association of legal people, whether natural, juridical or a mixture of both, with a specific objective. Company members share a common purpose and unite to achieve specifi ...
,
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,
regiment
A regiment is a military unit. Its role and size varies markedly, depending on the country, military service, service, or administrative corps, specialisation.
In Middle Ages, Medieval Europe, the term "regiment" denoted any large body of l ...
s,
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, and
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 their naval and air force equivalents.
One of the oldest military publications is ''
The Art of War'', by the
Chinese philosopher Sun Tzu
Sun Tzu (; zh, t=孫子, s=孙子, first= t, p=Sūnzǐ) may have been a Chinese General, military general, strategist, philosopher, and writer who lived during the Eastern Zhou period (771–256 BC). Sun Tzu is traditionally credited as the au ...
. Written in the 6th century BCE, the 13-chapter book is intended as military instruction, and not as
military theory, but has had a huge influence on Asian military doctrine, and from the late 19th century, on European and United States
military planning. It has even been used to formulate business tactics, and can even be applied in social and political areas.

The Classical Greeks and the Romans wrote prolifically on
military campaign
A military campaign is large-scale long-duration significant military strategy plan incorporating a series of interrelated military operations or battles forming a distinct part of a larger conflict often called a war. The term derives from th ...
ing. Among the best-known Roman works are
Julius Caesar
Gaius Julius Caesar (12 or 13 July 100 BC – 15 March 44 BC) was a Roman general and statesman. A member of the First Triumvirate, Caesar led the Roman armies in the Gallic Wars before defeating his political rival Pompey in Caesar's civil wa ...
's commentaries on the
Gallic Wars, and the
Roman Civil war – written about 50 BC.
Two major works on tactics come from the late Roman period: ''Taktike Theoria'' by
Aelianus Tacticus, and ''
De Re Militari'' ('On military matters') by
Vegetius. ''Taktike Theoria'' examined Greek military tactics, and was most influential in the
Byzantine
The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived the events that caused the fall of the Western Roman E ...
world and during the
Golden Age of Islam.
''De Re Militari'' formed the basis of European military tactics until the late 17th century. Perhaps its most enduring maxim is
''Igitur qui desiderat pacem, praeparet bellum'' (let he who desires peace prepare for war).
Due to the changing nature of combat with the introduction of
artillery
Artillery consists of ranged weapons that launch Ammunition, munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during sieges, and l ...
in the European
Middle Ages
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
, and infantry firearms in the
Renaissance
The Renaissance ( , ) is a Periodization, period of history and a European cultural movement covering the 15th and 16th centuries. It marked the transition from the Middle Ages to modernity and was characterized by an effort to revive and sur ...
, attempts were made to define and identify those strategies,
grand tactics, and tactics that would produce a victory more often than that achieved by the Romans in praying to the gods before the battle.
Later this became known as
military science
Military science is the study of military processes, institutions, and behavior, along with the study of warfare, and the theory and application of organized coercive force. It is mainly focused on theory, method, and practice of producing mi ...
, and later still, would adopt the
scientific method
The scientific method is an Empirical evidence, empirical method for acquiring knowledge that has been referred to while doing science since at least the 17th century. Historically, it was developed through the centuries from the ancient and ...
approach to the conduct of military operations under the influence of the
Industrial Revolution
The Industrial Revolution, sometimes divided into the First Industrial Revolution and Second Industrial Revolution, was a transitional period of the global economy toward more widespread, efficient and stable manufacturing processes, succee ...
thinking. In his seminal book ''
On War'', 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
Major-General and leading
expert
An expert is somebody who has a broad and deep understanding and competence in terms of knowledge, skill and experience through practice and education in a particular field or area of study. Informally, an expert is someone widely recognized ...
on modern
military strategy
Military strategy is a set of ideas implemented by military organizations to pursue desired Strategic goal (military), strategic goals. Derived from the Greek language, Greek word ''strategos'', the term strategy, when first used during the 18th ...
,
Carl von Clausewitz
Carl Philipp Gottlieb von Clausewitz ( , ; born Carl Philipp Gottlieb Clauswitz; 1 July 1780 – 16 November 1831) was a Kingdom of Prussia, Prussian general and Military theory, military theorist who stressed the "moral" (in modern terms meani ...
defined military strategy as 'the employment of battles to gain the end of war'. According to Clausewitz:
strategy forms the plan of the War, and to this end it links together the series of acts which are to lead to the final decision, that is to say, it makes the plans for the separate campaigns and regulates the combats to be fought in each.
Hence, Clausewitz placed political aims above
military goals, ensuring
civilian control of the military
Civil control of the military is a doctrine in military science, military and political science that places ultimate command responsibility, responsibility for a country's Grand strategy, strategic decision-making in the hands of the state's c ...
. Military strategy was one of a triumvirate of '
arts
The arts or creative arts are a vast range of human practices involving creativity, creative expression, storytelling, and cultural participation. The arts encompass diverse and plural modes of thought, deeds, and existence in an extensive ...
' or 'sciences' that governed the conduct of warfare, the others being:
military tactics, the execution of plans and
manoeuvring of forces in battle, and maintenance of an army.

The meaning of military tactics has changed over time; from the deployment and manoeuvring of entire land armies on the fields of ancient battles, and galley fleets; to modern use of small unit
ambush
An ambush is a surprise attack carried out by people lying in wait in a concealed position. The concealed position itself or the concealed person(s) may also be called an "". Ambushes as a basic military tactics, fighting tactic of soldi ...
es,
encirclements,
bombardment attacks,
frontal assaults,
air assaults,
hit-and-run tactics used mainly by
guerrilla
Guerrilla warfare is a form of unconventional warfare in which small groups of irregular military, such as rebels, Partisan (military), partisans, paramilitary personnel or armed civilians, which may include Children in the military, recruite ...
forces, and, in some cases,
suicide attacks on land and at sea. Evolution of
aerial warfare introduced its own
air combat tactics. Often,
military deception, in the form of
military camouflage or misdirection using
decoys, is used to confuse the enemy as a tactic.
A major development in
infantry tactics came with the increased use of
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 ...
in the 19th and 20th centuries. This was mainly employed in
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
in the
Gallipoli campaign, and the
Western Front. Trench warfare often turned to a stalemate, only broken by a large loss of life, because, in order to attack an enemy entrenchment, soldiers had to run through an exposed '
no man's land' under heavy fire from their opposing entrenched enemy.
Technology

As with any occupation, since ancient times, the military has been distinguished from other members of the society by their tools: the
weapon
A weapon, arm, or armament is any implement or device that is used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime (e.g., murder), law ...
s and
military equipment used in combat. When
Stone Age
The Stone Age was a broad prehistory, prehistoric period during which Rock (geology), stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years and ended b ...
humans first took
flint
Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start ...
to tip the
spear, it was the first example of
applying technology to improve the weapon. Since then, the advances made by human societies, and that of weapons, has been closely linked. Stone weapons gave way to
Bronze Age
The Bronze Age () was a historical period characterised principally by the use of bronze tools and the development of complex urban societies, as well as the adoption of writing in some areas. The Bronze Age is the middle principal period of ...
and
Iron Age
The Iron Age () is the final epoch of the three historical Metal Ages, after the Chalcolithic and Bronze Age. It has also been considered as the final age of the three-age division starting with prehistory (before recorded history) and progre ...
weapons such as
sword
A sword is an edged and bladed weapons, edged, bladed weapon intended for manual cutting or thrusting. Its blade, longer than a knife or dagger, is attached to a hilt and can be straight or curved. A thrusting sword tends to have a straighter ...
s and
shields. With each technological change was realized some tangible increase in military capability, such as through greater effectiveness of a sharper edge in defeating
armour
Armour (Commonwealth English) or armor (American English; see American and British English spelling differences#-our, -or, spelling differences) is a covering used to protect an object, individual, or vehicle from physical injury or damage, e ...
, or
improved density of materials used in manufacture of weapons.
On
land
Land, also known as dry land, ground, or earth, is the solid terrestrial surface of Earth not submerged by the ocean or another body of water. It makes up 29.2% of Earth's surface and includes all continents and islands. Earth's land sur ...
, the first significant technological advance in warfare was the development of ranged weapons, notably the
sling and later the
bow and arrow
The bow and arrow is a ranged weapon system consisting of an elasticity (physics), elastic launching device (bow) and long-shafted projectiles (arrows). Humans used bows and arrows for hunting and aggression long before recorded history, and the ...
. The next significant advance came with the
domestication of the horses and mastering of
equestrianism
Equestrianism (from Latin , , , 'horseman', 'horse'), commonly known as horse riding ( Commonwealth English) or horseback riding (American English), includes the disciplines of riding, driving, and vaulting. This broad description includes the ...
, creating
cavalry
Historically, cavalry (from the French word ''cavalerie'', itself derived from ''cheval'' meaning "horse") are groups of soldiers or warriors who Horses in warfare, fight mounted on horseback. Until the 20th century, cavalry were the most mob ...
and allowing for faster military advances and better logistics. Possibly the most significant advancement was the
wheel
A wheel is a rotating component (typically circular in shape) that is intended to turn on an axle Bearing (mechanical), bearing. The wheel is one of the key components of the wheel and axle which is one of the Simple machine, six simple machin ...
, a staple of transportation, starting with the
chariot and eventually
siege engines. The bow was manufactured in increasingly larger and more powerful versions to increase both the weapon range and armour penetration performance, developing into
composite bows,
recurve bow
In archery, a recurve bow is one of the main Bow shape, shapes a bow (weapon), bow can take, with limbs that curve away from the archer when unstrung. A recurve bow stores more energy and delivers energy more efficiently than the equivalent strai ...
s,
longbows, and
crossbow
A crossbow is a ranged weapon using an Elasticity (physics), elastic launching device consisting of a Bow and arrow, bow-like assembly called a ''prod'', mounted horizontally on a main frame called a ''tiller'', which is hand-held in a similar f ...
s. These proved particularly useful during the rise of cavalry, as horsemen encased in ever-more sophisticated
armour
Armour (Commonwealth English) or armor (American English; see American and British English spelling differences#-our, -or, spelling differences) is a covering used to protect an object, individual, or vehicle from physical injury or damage, e ...
came to dominate the battlefield.
In
medieval China,
gunpowder
Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, charcoal (which is mostly carbon), and potassium nitrate, potassium ni ...
had been invented, and was increasingly used by the military in combat. The use of gunpowder in the early
vase-like mortars in Europe, and advanced versions of the longbow and crossbow with armour-piercing
arrowheads, put an end to the dominance of the armoured knight. Gunpowder resulted in the development and fielding of the
musket, which could be used effectively with little training. In time, the successors to muskets and
cannon
A cannon is a large-caliber gun classified as a type of artillery, which usually launches a projectile using explosive chemical propellant. Gunpowder ("black powder") was the primary propellant before the invention of smokeless powder during th ...
s, in the form of
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 ...
s and
artillery
Artillery consists of ranged weapons that launch Ammunition, munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during sieges, and l ...
, would become core battlefield technology.

As the speed of technological advances accelerated in civilian applications, so too did military and warfare become
industrialized. The newly invented
machine gun and
repeating rifle redefined
firepower on the battlefield, and, in part, explains the high casualty rates of the
American Civil War
The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
and the decline of melee combat in warfare. The next breakthrough was the conversion of artillery parks from the
muzzle-loading guns, to quicker
breech-loading guns with recoiling barrels that allowed quicker aimed fire and use of a shield. The widespread introduction of low smoke (smokeless) propellant powders since the 1880s also allowed for a great improvement of artillery ranges. The development of breech loading had the greatest effect on
naval warfare
Naval warfare is combat in and on the sea, the ocean, or any other battlespace involving a major body of water such as a large lake or wide river.
The Military, armed forces branch designated for naval warfare is a navy. Naval operations can be ...
for the first time since the Middle Ages, altering the way weapons are mounted on
warship
A warship or combatant ship is a naval ship that is used for naval warfare. Usually they belong to the navy branch of the armed forces of a nation, though they have also been operated by individuals, cooperatives and corporations. As well as b ...
s.
Naval tactics were divorced from the reliance on
sails with the invention of the
internal combustion. A further advance in military naval technology was the
submarine
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...
and the
torpedo.

During
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
, the need to break the deadlock of trench warfare saw the rapid development of many new technologies, particularly
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; ...
s.
Military aviation
Military aviation is the design, development and use of military aircraft and other flying machines for the purposes of conducting or enabling aerial warfare, including national airlift (air cargo) capacity to provide military logistics, logist ...
was extensively used, and
bomber
A bomber is a military combat aircraft that utilizes
air-to-ground weaponry to drop bombs, launch aerial torpedo, torpedoes, or deploy air-launched cruise missiles.
There are two major classifications of bomber: strategic and tactical. Strateg ...
s became decisive in many battles of
World War II
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 ...
, which marked the most frantic period of weapons development in history. Many new designs, and concepts were used in combat, and all existing technologies of warfare were improved between 1939 and 1945.
During World War II, significant advances were made in
military communications through increased use of radio, military intelligence through use of the
radar
Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ...
, and in
military medicine through use of
penicillin
Penicillins (P, PCN or PEN) are a group of beta-lactam antibiotic, β-lactam antibiotics originally obtained from ''Penicillium'' Mold (fungus), moulds, principally ''Penicillium chrysogenum, P. chrysogenum'' and ''Penicillium rubens, P. ru ...
, while in the air, the guided
missile
A missile is an airborne ranged weapon capable of self-propelled flight aided usually by a propellant, jet engine or rocket motor.
Historically, 'missile' referred to any projectile that is thrown, shot or propelled towards a target; this ...
,
jet aircraft
A jet aircraft (or simply jet) is an aircraft (nearly always a fixed-wing aircraft) propelled by one or more jet engines.
Whereas the engines in Propeller (aircraft), propeller-powered aircraft generally achieve their maximum efficiency at much ...
, and
helicopter
A helicopter is a type of rotorcraft in which Lift (force), lift and thrust are supplied by horizontally spinning Helicopter rotor, rotors. This allows the helicopter to VTOL, take off and land vertically, to hover (helicopter), hover, and ...
s were seen for the first time. Perhaps the most infamous of all military technologies was the creation of
nuclear weapon
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission or atomic bomb) or a combination of fission and fusion reactions (thermonuclear weapon), producing a nuclear exp ...
s, although the exact effects of its
radiation
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or a material medium. This includes:
* ''electromagnetic radiation'' consisting of photons, such as radio waves, microwaves, infr ...
were unknown until the early 1950s. Far greater use of
military vehicles had finally eliminated the cavalry from the military
force structure.
After World War II, with the onset 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 constant technological development of new weapons was institutionalized, as participants engaged in a constant
arms race in capability development. This constant state of weapons development continues into the present.
Main battle tanks, and other heavy equipment such as
armoured fighting vehicle
An armoured fighting vehicle (British English) or armored fighting vehicle (American English) (AFV) is an armed combat vehicle protected by vehicle armour, armour, generally combining operational mobility with Offensive (military), offensive a ...
s,
military aircraft, and
ship
A ship is a large watercraft, vessel that travels the world's oceans and other Waterway, navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally disti ...
s, are characteristic to organized military forces.

The most significant technological developments that influenced combat have been guided missiles, which can be used by all branches of the armed services. More recently,
information technology
Information technology (IT) is a set of related fields within information and communications technology (ICT), that encompass computer systems, software, programming languages, data processing, data and information processing, and storage. Inf ...
, and its use in
surveillance
Surveillance is the monitoring of behavior, many activities, or information for the purpose of information gathering, influencing, managing, or directing. This can include observation from a distance by means of electronic equipment, such as ...
, including space-based reconnaissance systems, have played an increasing role in military operations. The impact of
information warfare, which focuses on attacking command communication systems, and military databases, has been coupled with the use of robotic systems in combat, such as
unmanned combat aerial vehicle
An unmanned combat aerial vehicle (UCAV), also known as a combat drone, fighter drone or battlefield UAV, is an unmanned aerial vehicle (UAV) that is used for intelligence, surveillance, target acquisition, and reconnaissance and carries aircra ...
s and
unmanned ground vehicles.
Recently, there has also been a particular focus towards the use of
renewable fuels for running military vehicles on. Unlike fossil fuels, renewable fuels can be produced in any country, creating a strategic advantage. The U.S. military has committed itself to have 50% of its energy consumption come from alternative sources.
As part of society

For much of
military history
Military history is the study of War, armed conflict in the Human history, history of humanity, and its impact on the societies, cultures and economies thereof, as well as the resulting changes to Politics, local and international relationship ...
, the armed forces were considered to be for use by the heads of their societies, until recently, the
crowned heads of states. In a democracy or other political system run in the public interest, it is a
public force.
The relationship between the military and the
society
A society () is a group of individuals involved in persistent social interaction or a large social group sharing the same spatial or social territory, typically subject to the same political authority and dominant cultural expectations. ...
it serves is a complicated and ever-evolving one. Much depends on the nature of the society itself, and whether it sees the military as important, as for example in time of threat or war, or a burdensome expense typified by defence cuts in time of peace.
One difficult matter in the relation between military and society is control and transparency. In some countries, limited information on military operations and budgeting is accessible for the public. However, transparency in the military sector is crucial to fight
corruption
Corruption is a form of dishonesty or a criminal offense that is undertaken by a person or an organization that is entrusted in a position of authority to acquire illicit benefits or abuse power for one's gain. Corruption may involve activities ...
. This showed the Government Defence Anti-corruption Index
Transparency International UK published in 2013.
Militaries often function as
societies
A society () is a group of individuals involved in persistent social interaction or a large social group sharing the same spatial or social territory, typically subject to the same political authority and dominant cultural expectations. ...
within societies, by having their own military communities,
economies,
education
Education is the transmission of knowledge and skills and the development of character traits. Formal education occurs within a structured institutional framework, such as public schools, following a curriculum. Non-formal education als ...
,
medicine
Medicine is the science and Praxis (process), practice of caring for patients, managing the Medical diagnosis, diagnosis, prognosis, Preventive medicine, prevention, therapy, treatment, Palliative care, palliation of their injury or disease, ...
, and other aspects of a functioning
civilian society. A military is not limited to nations in of itself, as many
private military companies (or PMCs) can be used or hired by organizations and figures as security, escort, or other means of protection where police, agencies, or militaries are absent or not trusted.
Ideology and ethics
Militarist ideology is the
society
A society () is a group of individuals involved in persistent social interaction or a large social group sharing the same spatial or social territory, typically subject to the same political authority and dominant cultural expectations. ...
's
social attitude of being best served, or being a beneficiary of a
government
A government is the system or group of people governing an organized community, generally a State (polity), state.
In the case of its broad associative definition, government normally consists of legislature, executive (government), execu ...
, or guided by concepts embodied in the military ''culture, doctrine, system'', or ''leaders''.
Either because of the
cultural memory, national history, or the potentiality of a
military threat, the militarist argument asserts that a
civilian population is dependent upon, and thereby subservient to the needs and goals of its military for continued
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 ...
.
Militarism is sometimes contrasted with the concepts of
comprehensive national power,
soft power and
hard power.
Most nations have separate
military laws which regulate conduct in war and during peacetime. An early exponent was
Hugo Grotius, whose ''
On the Law of War and Peace'' (1625) had a major impact of the humanitarian approach to warfare development. His theme was echoed by
Gustavus Adolphus.
Ethics of warfare have developed since 1945, to create constraints on the military treatment of prisoners and civilians, primarily by the
Geneva Conventions; but rarely apply to use of the military forces as internal security troops during times of political conflict that results in popular protests and incitement to
popular uprising.
International protocols restrict the use, or have even created international bans on some types of weapons, notably
weapons of mass destruction
A weapon of mass destruction (WMD) is a Biological agent, biological, chemical weapon, chemical, Radiological weapon, radiological, nuclear weapon, nuclear, or any other weapon that can kill or significantly harm many people or cause great dam ...
(WMD).
International conventions define what constitutes a
war crime
A war crime is a violation of the laws of war that gives rise to individual criminal responsibility for actions by combatants in action, such as intentionally killing civilians or intentionally killing prisoners of war, torture, taking hostage ...
, and provides for war crimes prosecution. Individual countries also have elaborate codes of
military justice, an example being the United States'
Uniform Code of Military Justice that can lead to
court martial
A court-martial (plural ''courts-martial'' or ''courts martial'', as "martial" is a postpositive adjective) is a military court or a trial conducted in such a court. A court-martial is empowered to determine the guilt of members of the mili ...
for military personnel found guilty of war crimes.
Military actions are sometimes argued to be justified by furthering a humanitarian cause, such as
disaster relief
Emergency management (also Disaster management) is a science and a system charged with creating the framework within which communities reduce vulnerability to hazards and cope with disasters. Emergency management, despite its name, does not actu ...
operations to defend refugees; such actions are called
military humanism.
See also
*
Arms industry
*
Civil defense
Civil defense or civil protection is an effort to protect the citizens of a state (generally non-combatants) from human-made and natural disasters. It uses the principles of emergency management: Risk management, prevention, mitigation, prepara ...
*
Civilian control of the military
Civil control of the military is a doctrine in military science, military and political science that places ultimate command responsibility, responsibility for a country's Grand strategy, strategic decision-making in the hands of the state's c ...
*
Command and control
*
Conscription
Conscription, also known as the draft in the United States and Israel, is the practice in which the compulsory enlistment in a national service, mainly a military service, is enforced by law. Conscription dates back to antiquity and it conti ...
*
Court-martial
*
Deterrence theory
*
Martial arts
Martial arts are codified systems and traditions of combat practiced for a number of reasons such as self-defence; military and law enforcement applications; combat sport, competition; physical, mental, and spiritual development; entertainment; ...
*
Martial law
*
Mercenary
*
Militaria
*
Military academy
*
Military advisor
*
Military aid
*
Military aid to the civil community (MACC)
*
Military aid to the civil power (MACP)
*
Military alliance
A military alliance is a formal Alliance, agreement between nations that specifies mutual obligations regarding national security. In the event a nation is attacked, members of the alliance are often obligated to come to their defense regardless ...
*
Military dictatorship
*
Military district
*
Military engineering
*
Military exercise
*
Military fiat
*
Military incompetence
*
Military–industrial complex
*
Military junta
A military junta () is a system of government led by a committee of military leaders. The term ''Junta (governing body), junta'' means "meeting" or "committee" and originated in the Junta (Peninsular War), national and local junta organized by t ...
*
Military meteorology
*
Military operations other than war
*
Military police
Military police (MP) are law enforcement agencies connected with, or part of, the military of a state. Not to be confused with civilian police, who are legally part of the civilian populace. In wartime operations, the military police may supp ...
*
Military prison
A military prison is a prison operated by a military. Military prisons are used variously to house prisoners of war, unlawful combatants, those whose freedom is deemed a national security risk by the military or national authorities, and members o ...
*
Military Revolution
*
Military sociology
*
Military terminology
*
Militarization of police
*
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 ...
*
Ministry of defence
*
Mobilization
*
Police
The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order ...
*
Private military company
*
Staff (military)
A military staff or general staff (also referred to as army staff, navy staff, or air staff within the individual services) is a group of officers, enlisted, and civilian staff who serve the commander of a division or other large milit ...
*
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 ...
*
Weapon
A weapon, arm, or armament is any implement or device that is used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime (e.g., murder), law ...
; Armed forces of the world
*
List of countries by number of military and paramilitary personnel
*
List of countries by level of military equipment
*
List of countries by Global Militarization Index
*
List of countries without armed forces
*
List of militaries by country
*
List of air forces
*
Lists of armies
*
List of navies
References
Notes
External links
Military Expenditure % of GDPhosted by Lebanese economy forum, extracted from the World Bank public data.
{{Authority control
Government institutions
International security
National security
Main topic articles