I Corps, 1st Corps, or First Corps may refer to:
France
- 1st Army Corps (France)
- I Cavalry Corps (Grande Armée), a cavalry unit of the Imperial French Army during the Napoleonic Wars
- I Corps (Grande Armée), a unit of the Imperial French Army during the Napoleonic Wars
Germany
- I Cavalry Corps (German Empire), a unit of the Imperial German Army
- I Corps (German Empire), a unit of the Imperial German Army
- I Reserve Corps (German Empire), a unit of the Imperial German Army
- I Royal Bavarian Corps, a unit of the Bavarian Army and the Imperial German Army
- I Royal Bavarian Reserve Corps, a unit of the Bavarian Army and the Imperial German Army
- I Army Corps (Wehrmacht), a unit in World War II
- I SS Panzer Corps, a unit in World War II
India
Russia and Soviet Union
- 1st Army Corps (Russian Empire)
- 1st Guards Assault Aviation Corps
- 1st Guards Mechanized Corps (Soviet Union)
- 1st Airborne Corps (Soviet Union)
- 1st Army Corps (Armed Forces of South Russia), a unit in the Russian Civil War
- 1st Army Corps (Soviet Union)
- 1st Assault Aviation Corps
- 1st Cavalry Corps (Russian Empire)
- 1st Rifle Corps, Soviet Union
United Kingdom
United States
Others
- I ANZAC Corps, Australia and New Zealand
- I Corps (Australia)
- I Corps (Belgium)
- I Corps (Bosnia and Herzegovina)
- I Canadian Corps
- I Corps (Czechoslovakia)
- Finnish I Corps (Winter War)
- I Army Corps (Greece)
- I Corps (North Korea)
- I Corps (Ottoman Empire)
- I Corps (Pakistan)
- I Corps (Sri Lanka)
- Polish I Corps (disambiguation), several units
- 1st Territorial Army Corps (Romania)
- I Corps (South Korea)
- I Corps (South Vietnam)
- 1st Corps (Syria)
- 1st Corps (Vietnam People's Army)
- 1st Corps (Yugoslav Partisans), during World War II
See also
- List of military corps by number
- 1st Army Corps (disambiguation)
- 1st Army (disambiguation)
- 1st Brigade (disambiguation)
- 1st Division (disambiguation)
- 1st Regiment (disambiguation)
- 1 Squadron (disambiguation)
This disambiguation page lists articles about military units and formations which are associated with the same title.
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If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
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