45th Division may refer to:

Infantry divisions

45th Reserve Division (German Empire) The 45th Reserve Division (''45. Reserve-Division'') was a unit of the Imperial German Army in World War I. The division was formed in August 1914 and organized over the next two months. It was part of the first wave of new divisions formed at th ...

* 45th Landwehr Division (German Empire) *

45th Infantry Division (Wehrmacht) With the annexation of Austria in 1938 by Nazi Germany, what was once the 4th Austrian Division was incorporated into the Wehrmacht (German Army) and re-designated the 45th Infantry Division. In the 1939 Invasion of Poland, the division was on th ...

45th Rifle Division (Soviet Union) The 45th Rifle Division was a Red Army infantry division formed originally during the Russian Civil War that fought in World War II and then served through the Cold War in the Leningrad Military District. The division was originally formed 16 Ju ...

45th Infantry Division (United Kingdom) The 45th Infantry Division was an infantry division of the British Army, formed just prior to the start of the Second World War. In March 1939, after the re-emergence of Germany as a significant military power and its occupation of Czechoslov ...

* 45th Infantry Division (United States) * 45th Infantry Division (Poland) *

45th Division (Spain) The 45th Division ( es, 45.ª División) was a division of the Spanish Republican Army in the Spanish Civil War. This unit was established in mid 1937 in order to gather some scattered units of the International Brigades under one command, th ...

Aviation divisions

45th Air Division The 45th Air Division is an inactive United States Air Force unit. Its last assignment was with Eighth Air Force at Pease Air Force Base, New Hampshire. It was inactivated on 14 June 1989. History As the 45th Bombardment Wing, the unit was one ...

(United States) {{mil-unit-dis