XXI Corps

21 Corps, 21st Corps, Twenty First Corps, or XXI Corps may refer to:

• XXI Corps (German Empire), a unit of the Imperial German Army prior to and during World War I
• XXI Corps (Ottoman Empire), active during World War I
• XXI Corps (United Kingdom), active during World War I
• Indian XXI Corps, active during World War II
• XXI Corps (India), currently active Indian Army corps
• 21st Army Corps (Ukraine)
• XXI Corps (United States), active during World War II
• XXI Corps (Union Army), active during the American Civil War
• XXI Mountain Corps (Wehrmacht), active during World War II

See also

• List of military corps by number
• 21st Army (disambiguation)
• 21st Brigade (disambiguation)
• 21st Division (disambiguation)
• 21st Regiment (disambiguation)
• 21 Squadron (disambiguation)