This is a list of armies arranged by

ordinal number In set theory, an ordinal number, or ordinal, is a generalization of ordinal numerals (first, second, th, etc.) aimed to extend enumeration to infinite sets. A finite set can be enumerated by successively labeling each element with the least n ...

First Army

* First Allied Airborne Army *

First Army (Australia) The First Australian Army was a field army of the Australian Army, during World War II. The formation's headquarters was raised in April 1942 from the existing 1st Australian Corps headquarters, assuming command of all Allied troops in Queen ...

First Army (Austria-Hungary) The 1st Army (german: k.u.k. 1. Armee) was a field army-level command in the ground forces of Austria-Hungary during World War I. The army fought in Galicia and Russian Poland in 1914–15 before being briefly dissolved in the summer of 1916. Shor ...

* First Army (Bulgaria) *

First Canadian Army The First Canadian Army (french: 1reArmée canadienne) was a field army and a formation of the Canadian Army in World War II in which most Canadian elements serving in North-West Europe were assigned. It served on the Western Front from July 1944 ...

* New 1st Army (Republic of China) * First Army (France) *

1st Army (German Empire) The 1st Army (german: 1. Armee / Armeeoberkommando 1 / A.O.K. 1) was an army level command of the German Army in World War I. It was formed on mobilization in August 1914 from the VIII Army Inspectorate. The army was dissolved on 17 Septembe ...

, a World War I field army *

1st Army (Wehrmacht) The 1st Army (german: 1. Armee) was a World War II field army. Combat chronicle 1939 The 1st Army was activated on 26 August 1939, in Wehrkreis XII with General Erwin von Witzleben in command. Its primary mission was to take defensive positions ...

, a World War II field army *

1st Panzer Army The 1st Panzer Army (german: 1. Panzerarmee) was a German tank army that was a large armoured formation of the Wehrmacht during World War II. When originally formed on 1 March 1940, the predecessor of the 1st Panzer Army was named Panzer Group ...

(Germany) *

1st Parachute Army (Germany) The German 1st Parachute Army (1. ''Fallschirm-Armee'') was formed in September, 1944, comprising 30,000 men. History Its first commander was Colonel General Kurt Student, the ''Wehrmacht''s airborne pioneer. During the Allied Operation Market ...

First Army (Greece) The Greek First Army (, ''Proti Stratia''), is the highest formation of the Hellenic Army and its only extant field army. Various English and German-language sources erroneously mention the existence of a First Army during the Greco-Italian War ...

First Army (Hungary) The Hungarian First Army was a field army of the Royal Hungarian Army that saw action during World War II. Commanders * Lieutenant-General Vilmos Nagy - March 1, 1940 – February 1, 1941 * Lieutenant-General István Schweitzer - February 1, ...

* First Army (Italy) * First Army (Japan) * First Army (Ottoman Empire) *

First Polish Army (1920) The First Army was a field army of the Polish Army that existed during the Polish–Soviet War. In March 1920 the Headquarters of the Army decided to disband the Front HQs active until then and reform them into separate armies. The largest of Po ...

First Polish Army (1944–45) First or 1st is the ordinal form of the number one (#1). First or 1st may also refer to: *World record, specifically the first instance of a particular achievement Arts and media Music * 1$T, American rapper, singer-songwriter, DJ, and reco ...

* First Army (Romania) *

1st Army (Russian Empire) The 1st Army (russian: 1-я армия, translit=1А) was an army-level command of the Russian Imperial Army created during World War I. The First Army, commanded by General Paul von Rennenkampf, invaded East Prussia at the outbreak of war in 19 ...

*First Army (Serbia) *1st Red Banner Army (Soviet Union) *First Army (Turkey) *First Army (United Kingdom) *First United States Army *1st Army (Kingdom of Yugoslavia)

Second Army

*Second Army (Australia) *Second Army (Austria-Hungary) *Second Army (Bulgaria) *Second Army (Egypt) *Second Army (France) *2nd Army (German Empire), a World War I field army *2nd Army (Wehrmacht), a World War II field army *2nd Panzer Army (Germany) *Second Army (Hungary) *Second Army (Italy) *Second Army (Japan) *Second Army (Ottoman Empire) *Second Army (Poland) *2nd Army (Russian Empire) *Second Army (Serbia) *2nd Red Banner Army (Soviet Union) *Second Army (Turkey) *Second United States Army *Second Army (United Kingdom) *2nd Army (Kingdom of Yugoslavia)

Third Army

*Third Army (Bulgaria) *Third Army (Egypt) *Third Army (France) *3rd Army (German Empire), a World War I field army *3rd Army (Wehrmacht), a World War II field army *3rd Panzer Army (Germany) *Third Army (Ottoman Empire) *Third Army (Italy) *Third Army (Romania) *Third Army (Serbia) *3rd Army (Russian Empire) *3rd Army (Soviet Union) *Third Army (Turkey) *Third Army (United Kingdom) *Third United States Army, another name for United States Army Central *3rd Army (Kingdom of Yugoslavia)

Fourth Army

*Fourth Army (Bulgaria) *Fourth Army (National Revolutionary Army) (Republic of China) *New Fourth Army (Republic of China) *Fourth Army (France) *4th Army (German Empire), a World War I field army *4th Army (Wehrmacht), a World War II field army *4th Panzer Army (Germany) *Fourth Army (Ottoman Empire) *Fourth Army (Italy) *Fourth Army (Romania) *4th Army (Russian Empire) *4th Army (Soviet Union) *4th Air Army (Soviet Union and later Russian Federation) *4th Guards Army (Soviet Union) *20th Guards Army (originally designated as "Fourth Tank Army") (Soviet Union) *Fourth Army (United Kingdom) *Fourth United States Army *4th Army (Kingdom of Yugoslavia)

Fifth Army

*Fifth Army (Austria-Hungary) *Fifth Army (Bulgaria) *Fifth Army (France) *5th Army (German Empire), a World War I field army *5th Army (Wehrmacht), a World War II field army *5th Panzer Army (Germany) *Fifth Army (Japan) *Fifth Army (Ottoman Empire) *Fifth Army (Italy) *5th Army (Russian Empire) *5th Army (Soviet Union) *Fifth Army (United Kingdom) *Fifth United States Army, another name for United States Army North *5th Army (Kingdom of Yugoslavia)

Sixth Army

*Sixth Army (Austria-Hungary) *Sixth Army (France) *6th Army (German Empire), a World War I field army *6th Army (Wehrmacht), a World War II field army *6th Panzer Army (Germany) *Sixth Army (Japan) *Sixth Army (Ottoman Empire) *Sixth Army (Italy) *6th Army (Russian Empire) *6th Army (Soviet Union) *Sixth United States Army *6th Army (Kingdom of Yugoslavia)

Seventh Army

*Seventh Army (France) *7th Army (German Empire), a World War I field army *7th Army (Wehrmacht), a World War II field army *Seventh Army (Ottoman Empire) *Seventh Army (Italy) *7th Army (Russian Empire) *7th Army (Soviet Union) *Seventh United States Army, another name for United States Army Europe *7th Army (Kingdom of Yugoslavia)

Eighth Army

{{main, Eighth Army (disambiguation) *Eighth Route Army, a Chinese Communist force that fought against the Japanese during World War II *Eighth Army (France) *8th Army (German Empire), a World War I field army *8th Army (Wehrmacht), a World War II field army *Japanese Eighth Area Army *Eighth Army (Ottoman Empire), Ottoman Eighth Army *Eighth Army (Italy), during World War II another name for the ''Italian Army in Russia'' *Eighth Army (United Kingdom) *Eighth United States Army *8th Army (Russian Empire) *8th Army (Soviet Union) *8th Guards Army (Russia)

Ninth Army

*Ninth Army (France), a field army during World War I and World War II *9th Army (German Empire), a World War I field army *9th Army (Wehrmacht), a World War II field army *Ninth Army (Ottoman Empire), a World War I field army *Ninth Army (Italy) *9th Army (Russian Empire), a World War I field army *9th Army (Soviet Union), a field army active from 1939–43 and then after the war from 1966-1989 *Ninth Army (United Kingdom), a British Army formation during World War II *Ninth United States Army, used in Northwest Europe in 1944 and 1945

Tenth Army

*Tenth Army (France) *10th Army (German Empire), a World War I field army *10th Army (Wehrmacht), a World War II field army *Tenth Army (Japan) *Tenth Army (Italy) *10th Army (Russian Empire) *10th Army (Soviet Union) *Tenth Army (United Kingdom) *10th Guards Army (Soviet Union) *Tenth United States Army

Eleventh Army

*11th Army (German Empire), a World War I field army *11th Army (Wehrmacht), a World War II field army *11th SS Panzer Army *Eleventh Army (Japan) *Eleventh Army (Italy) *11th Air Army (Russia) *11th Army (Russian Empire) *11th Army (Soviet Union) *11th Army Group (United Kingdom)

Twelfth Army

*12th Army (German Empire), a World War I field army *12th Army (Wehrmacht), a World War II field army *Twelfth Army (Japan) *12th Army (Russian Empire) *12th Army (Soviet Union) *Twelfth Army (United Kingdom) *Twelfth Army (Italy)

Thirteenth Army

*Thirteenth Army (Japan) *Japanese Thirteenth Area Army *13th Army (Russian Empire)

Fourteenth Army

*14th Army (German Empire), a World War I field army *14th Army (Wehrmacht), a World War II field army *Japanese Fourteenth Area Army *14th Army (Soviet Union) *14th Guards Army (Soviet Union) *Fourteenth Army (United Kingdom) *Fourteenth United States Army, a World War II 'phantom' force

Fifteenth Army

*15th Army (Wehrmacht), a formation of the German Army during World War II *Fifteenth Army (Japan), a formation of the Imperial Japanese Army during World War II *Japanese Fifteenth Area Army, a formation of the Imperial Japanese Army during World War II *15th Army Group, a combined formation of the United Kingdom and United States armies during World War II *Fifteenth United States Army, a formation of the United States Army during World War II

Sixteenth Army

*16th Army (Wehrmacht), a unit of the German Army in World War II *11th Guards Army (16th Army, Soviet Union), a unit of the Soviet Army from World War II through the Cold War *Western Army (Russia) (16th Soviet Army), a unit of the Soviet Army during World War I *16th Army (People's Republic of China), a unit of People's Republic of China which still active right now.

Seventeenth Army

* 17th Army (German Empire), a World War I field Army * 17th Army (Wehrmacht), a World War II field army * Seventeenth Army (Japan) * Japanese Seventeenth Area Army during World War II (see List of Armies of the Japanese Army) * 17th Army (Soviet Union)

Eighteenth Army

* 18th Army (German Empire), a World War I field Army * 18th Army (Wehrmacht), a World War II field army *18th Army (Soviet Union) *Eighteenth Army (Japan)

Nineteenth Army

* 19th Army (German Empire), a World War I field Army * 19th Army (Wehrmacht), a World War II field army * Nineteenth Army (Japan) * 19th Army (Soviet Union)

Twentieth Army

*Twentieth Army (Japan) *20th Group Army - People's Liberation Army *20th Guards Army - Soviet Union and Russia *20th Army (Soviet Union) *20th Mountain Army (Wehrmacht)

Twenty first Army

*21st Army (Wehrmacht)