, image = Banner of the Holy Roman Emperor with haloes (1400-1806).svg , image_size = 150 , caption = , dates = 1422–1806 , country = , allegiance = , branch =

Army An army (from Old French ''armee'', itself derived from the Latin verb ''armāre'', meaning "to arm", and related to the Latin noun ''arma'', meaning "arms" or "weapons"), ground force or land force is a fighting force that fights primarily on ...

, size = , command_structure = , garrison = Vienna , garrison_label = Headquarters , nickname = , motto = , patron = , colors = , colors_label = , march = , mascot = , equipment = , equipment_label = , battles =

Ottoman–Habsburg wars The Ottoman–Habsburg wars were fought from the 16th through the 18th centuries between the Ottoman Empire and the Habsburg monarchy, which was at times supported by the Kingdom of Hungary, Polish–Lithuanian Commonwealth, and Habsburg Sp ...

Franco-Dutch War The Franco-Dutch War, also known as the Dutch War (french: Guerre de Hollande; nl, Hollandse Oorlog), was fought between France and the Dutch Republic, supported by its allies the Holy Roman Empire, Spain, Brandenburg-Prussia and Denmark-No ...

Nine Years' War

War of the Spanish Succession The War of the Spanish Succession was a European great power conflict that took place from 1701 to 1714. The death of childless Charles II of Spain in November 1700 led to a struggle for control of the Spanish Empire between his heirs, Phili ...

French Revolutionary and Napoleonic Wars The French Revolutionary and Napoleonic Wars, sometimes called the Great French War, were a series of conflicts between the French and several European monarchies between 1792 and 1815. They encompass first the French Revolutionary Wars again ...

War of the Polish Succession The War of the Polish Succession ( pl, Wojna o sukcesję polską; 1733–35) was a major European conflict sparked by a Polish civil war over the succession to Augustus II of Poland, which the other European powers widened in pursuit of their ...

, anniversaries = , decorations = , battle_honours = , commander1 = , commander1_label = , commander2 = , commander2_label = , notable_commanders =

Nicholas, Count of Salm Nicholas, Count of Salm ( Vielsalm, Belgium 1459 – Salmhof, Marchegg, Lower Austria, 4 May 1530) was a German soldier and an Imperial senior military commander (German: ''Feldherr''). His greatest achievement was the defense of Vienna ...

Charles V Charles V may refer to: * Charles V, Holy Roman Emperor (1500–1558) * Charles V of Naples (1661–1700), better known as Charles II of Spain * Charles V of France (1338–1380), called the Wise * Charles V, Duke of Lorraine (1643–1690) * Infant ...

Johann Tserclaes von Tilly

Albrecht von Wallenstein Albrecht Wenzel Eusebius von Wallenstein () (24 September 1583 – 25 February 1634), also von Waldstein ( cs, Albrecht Václav Eusebius z Valdštejna), was a Bohemian military leader and statesman who fought on the Catholic side during the T ...

Raimondo Montecuccoli Raimondo Montecuccoli (; 21 February 1609 – 16 October 1680) was an Italian-born professional soldier, military theorist, and diplomat, who served the Habsburg monarchy. Experiencing the Thirty Years' War from scratch as a simple footsoldie ...

Ernst Rüdiger von Starhemberg Count Ernst Rüdiger von Starhemberg (12 January 1638 – 4 January 1701) was military governor of Vienna from 1680, the city's defender during the Battle of Vienna in 1683, Imperial general during the Great Turkish War, and President of the ...

Eugene of Savoy Prince Eugene Francis of Savoy–Carignano, (18 October 1663 – 21 April 1736) better known as Prince Eugene, was a field marshal in the army of the Holy Roman Empire and of the Austrian Habsburg dynasty during the 17th and 18th centuries. He ...

Count de Mercy

Ludwig Andreas von Khevenhüller Ludwig Andreas Khevenhüller, Graf von Aichelberg-Frankenburg (en: Louis Andrew Khevenhüller, Count of Aichelberg-Frankenburg) (30 November 1683 – 26 January 1744) was an Austrian field-marshal who came of a noble family that was originally ...

Leopold Joseph von Daun Count Leopold Joseph von Daun (german: Leopold Joseph Maria, Reichsgraf von und zu Daun; 24 September 17055 February 1766), later Prince of Thiano, was an Austrian field marshal of the Imperial Army in the War of the Austrian Succession and ...

Ernst Gideon von Laudon Ernst Gideon von Laudon, since 1759 Freiherr von Laudon (originally Laudohn or Loudon; 13 February 171714 July 1790), was a Baltic German-born Austrian generalisimo and one of the most successful opponents of the Prussian king Frederick the Grea ...

Franz Moritz von Lacy
Archduke Charles , identification_symbol = , identification_symbol_label = , identification_symbol_2 = , identification_symbol_2_label = The Army of the Holy Roman Empire (german: Reichsarmee, ''Reichsheer'' or ''Reichsarmatur''; la, exercitus imperii) was created in 1422 and came to an end when the

Holy Roman Empire The Holy Roman Empire was a political entity in Western, Central, and Southern Europe that developed during the Early Middle Ages and continued until its dissolution in 1806 during the Napoleonic Wars. From the accession of Otto I in 962 ...

was dissolved in 1806 as a result of the

Napoleonic Wars The Napoleonic Wars (1803–1815) were a series of major global conflicts pitting the French Empire and its allies, led by Napoleon I, against a fluctuating array of European states formed into various coalitions. It produced a period of Fren ...

. The Army of the Empire did not constitute a permanent

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 o ...

which was always at the ready to fight for the Empire. When there was danger, an Army of the Empire was mustered from among the elements constituting it, in order to conduct an imperial military campaign or ''Reichsheerfahrt'' during an Imperial War (''Reichskrieg'') or an Imperial Execution (''Reichsexekution''). It could only be deployed with the consent of the Imperial Diet and should not be confused with the Imperial Army (''Kaiserliche Armee'') of the Emperor. In practice, the various forces of the Army of the Empire often had stronger local allegiances than their loyalty to the Emperor.

History

Prompted by the threat posed by the

Hussite The Hussites ( cs, Husité or ''Kališníci''; "Chalice People") were a Czech proto-Protestant Christian movement that followed the teachings of reformer Jan Hus, who became the best known representative of the Bohemian Reformation. The Hus ...

s, the Imperial Diet of 1422 held in

Nuremberg Nuremberg ( ; german: link=no, Nürnberg ; in the local East Franconian dialect: ''Nämberch'' ) is the second-largest city of the German state of Bavaria after its capital Munich, and its 518,370 (2019) inhabitants make it the 14th-largest ...

created the Army of the Empire by demanding specific contingents of troops from the various parts of the Empire. The

Hussite Wars The Hussite Wars, also called the Bohemian Wars or the Hussite Revolution, were a series of civil wars fought between the Hussites and the combined Catholic forces of Holy Roman Emperor Sigismund, the Papacy, European monarchs loyal to the ...

continued from 1420 to 1434, by which point the army had proved its worth. Over the next hundred years, the size of the Army was controlled either by the number of serving men being strictly regulated or by limits on the money that paid for it. At the

Diet of Worms The Diet of Worms of 1521 (german: Reichstag zu Worms ) was an imperial diet (a formal deliberative assembly) of the Holy Roman Empire called by Emperor Charles V and conducted in the Imperial Free City of Worms. Martin Luther was summoned to ...

in 1521 a commitment was made to keep the strength at 20,063

infantry Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infantry, air assault infantry, and m ...

and 4,202 cavalry. This was later simplified to 20,000 and 4,000. The monthly cost of paying for an army of this size was known as the Roman Month (''Römermonat''). The Imperial Register (''Reichsmatrikel'' or ''Heeresmatrikel'') determined the contributions of the individual states making up the Empire, the first being the Register of 1422. Contrary to popular belief, the Army of the Empire did not take part in the

Thirty Years' War The Thirty Years' War was one of the longest and most destructive conflicts in European history, lasting from 1618 to 1648. Fought primarily in Central Europe, an estimated 4.5 to 8 million soldiers and civilians died as a result of battl ...

of 1618 to 1648. The Emperor participated in this war with the Imperial Army (''Kaiserliche Armee'') instead. The Constitution of the Army of the Empire (''Reichsdefensionalordnung'') of 1681 finally determined the composition of the army, fixing the contingents to be provided by the various Imperial Circles. The simple total strength (called in Latin the ''Simplum'') was now fixed at 40,000 men, consisting of 28,000 infantry and 12,000 cavalry, including 2,000 dragoons (that is,

mounted infantry Mounted infantry were infantry Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infant ...

). In emergencies, the size of the army could be increased by doubling or tripling the contingents. Such multiples were called in Latin the ''duplum'' and the ''triplum''. The figures for the contingents to be supplied by each Imperial Circle were little altered until the demise of the Empire. In practice, they were organized into a number of separate

regiment A regiment is a military unit. Its role and size varies markedly, depending on the country, service and/or a specialisation. In Medieval Europe, the term "regiment" denoted any large body of front-line soldiers, recruited or conscripted ...

s. In some cases, money was provided instead of men to fulfil these military obligations to the Emperor.

Campaigns

Between the 1590s and the

, the Army fought in the wars directly affecting the Empire, usually with units of the Imperial Army of the Empire and other local territorial forces. It did not take part in the

of 1618 to 1648. *

Austro-Turkish War (1663–1664) The Austro-Turkish War (1663–1664) or fourth Austro-Turkish War was a short war between the Habsburg monarchy and the Ottoman Empire. The Ottoman aim was to resume the advance in central Europe, conquer Vienna and subdue Austria. The Ottoman ...

(1673–1679) * Nine Years' War (1688–1697) *

War of the Spanish Succession