21st Division or 21st Infantry Division may refer to:

Infantry divisions

21st Infantry Division (France) The 21st Infantry Division (french: 21e Division d'Infanterie, 21e DI) was a French Army formation during World War I and World War II. World War 1 During World War I, the division was composed of the 64th, 93rd and 137th Infantry Regiments, the ...

21st Division (German Empire) The 21st Division (''21. Division'') was a unit of the Prussian/German Army. It was formed on October 11, 1866, and was headquartered in Frankfurt am Main. The division was subordinated in peacetime initially to the XI Army Corps (''XI. Armeekor ...

21st Reserve Division (German Empire) The 21st Reserve Division (''21. Reserve-Division'') was a unit of the Imperial German Army in World War I. The division was formed on mobilization of the German Army in August 1914 as part of XVIII Reserve Corps. The division was disbanded in ...

21st Infantry Division (Wehrmacht) The 21st Infantry Division was a German military unit which fought during World War II. History The 21st Infantry Division (Germany) was formed in 1934 in Elbing, East Prussia, by expanding the 3rd Prussian Infantry Regiment of the 1st Divisi ...

* 21st Waffen Mountain Division of the SS ''Skanderbeg'', Germany *

21st Infantry Division (India) The 21st Indian Infantry Division was a division of the Indian Army during World War II. It was formed in April 1944 in Assam and is now part of IV Corps or Gajraj corps. History The 21st Indian Infantry Division was a division of the Indian ...

* 21st Infantry Division Granatieri di Sardegna, Kingdom of Italy *

21st Division (Imperial Japanese Army) The was an infantry division in the Imperial Japanese Army. Its tsūshōgō code name was the . The 21st Division was created 4 April 1938 as a triangular division as part of the military buildup following the outbreak of the Second Sino-Japanes ...

21st Mountain Infantry Division (Poland) The 21st Mountain Infantry Division (, 21 DPG) was a pre-war unit of the Polish Army. It was one of two mountain infantry divisions of Poland to take part in the Invasion of Poland of 1939. Currently its traditions are continued by Polish 21st Po ...

21st Division (South Vietnam) The 21st Division of the Army of the Republic of Vietnam (ARVN)—the army of the nation state of South Vietnam that existed from 1959 to 1975, was part of the IV Corps that oversaw the southernmost region of South Vietnam, the Mekong Delta. ...

21st Division (Spain) The 21st Division was one of the divisions of the Spanish Republican Army that were organized during the Spanish Civil War on the basis of the Mixed Brigades. Situated on the Andalusian front, the division played a minor role. History The unit ...

21st Division (United Kingdom) The 21st Division was an infantry division of the British Army during World War I, raised in September 1914 by men volunteering for Lord Kitchener's New Armies. The division moved to France in September 1915 and served on the Western Front fo ...

21st Infantry Division (Iran) 21st "Hamzeh" Division of Azarbaijan ( fa, لشکر ۲۱ حمزه آذربایجان), based in Tabriz, East Azerbaijan Province, established as combination of the 2nd Guards Brigade and the 1st Infantry Division in Tehran, with total of four mech ...

21st Division (People's Republic of China) The 21st Division () was a short-lived division of the Chinese People's Liberation Army which was in service both during and after the Chinese Civil War. The division was created in June 1949 by ''the Regulation of the Re-Designations of All Organi ...

Cavalry divisions

21st Cavalry Division (United States) The 21st Cavalry Division was a division of the United States Army National Guard located in the north eastern United States. The division was composed of personnel from the New York, New Jersey, Pennsylvania and Rhode Island Army National Guar ...

Armoured divisions

21st Panzer Division (Wehrmacht) The 21st Panzer Division was a German armoured division best known for its role in the battles of the North African Campaign from 1941–1943 during World War II when it was one of the two armoured divisions making up the Deutsches Afrikakorps ...

, Germany

Aviation divisions

21st Air Division (United States) The 21st Air Division (21st AD) is an inactive United States Air Force organization. Its last assignment was with Tactical Air Command, being stationed at Griffiss Air Force Base, New York. It was inactivated on 23 September 1983. History World W ...

Infantry divisions

Cavalry divisions

Armoured divisions

Aviation divisions

See also