AIR BORNE & CAVALRY DIVISIONS

Air assault divisions

•  11th Air Assault Division (Test) (formerly 11th Airborne Division): 1963–1965

Airborne divisions

• 6th Airborne Division: phantom World War II division
• 9th Airborne Division: phantom World War II division
•  11th Airborne Division: 1943–1958
•  13th Airborne Division: 1943–1946
• 15th Airborne Division: not actually organized during World War II
•  17th Airborne Division: 1943–1945; 1948–1949
• 18th Airborne Division: phantom World War II division
• 21st Airborne Division: phantom World War II division
• 80th Airborne Division: 1946–1952* (80th Infantry Division)
•  82nd Airborne Division: 1942–present
• 84th Airborne Division: 1946–1952* (84th Infantry Division)
• 100th Airborne Division: 1946–1952* (100th Infantry Division)
•  101st Airborne Division: 1942–1945; 1948–1949; 1950–1953; 1954–present
• 108th Airborne Division: 1946–1952* (108th Infantry Division)
• 135th Airborne Division: phantom World War II division

Cavalry divisions

In 1940, the National Guard voluntarily withdrew their allotment of the 21st through 24th Cavalry Divisions, partially in response to the Army’s decision that the National Guard did not need four Cavalry Divisions and the Army’s unwillingness to allot the National Guard armored divisions. The 61st through 66th Cavalry Divisions were inactivated in 1942.

• 1st Cavalry Division: 1921–present
•  2nd Cavalry Division: Unorganized. A 2nd Cavalry Division was constituted in 1921, but would remain unorganized until World War II.
• 3rd Cavalry Division: Unorganized. The 3rd Cavalry Division was placed on rolls in 1927 to complete an intended Cavalry Corps, but was never organized.
• 15th Cavalry Division: 1917–18
• 21st Cavalry Division: 1921–40
• 22nd Cavalry Division: 1921–40
• 23rd Cavalry Division: 1921–40
• 24th Cavalry Division: 1921–40
• 61st Cavalry Division: 1921–42
• 62nd Cavalry Division: 1921–42
• 63rd Cavalry Division: 1921–42
• 64th Cavalry Division: 1921–42
• 65th Cavalry Division: 1921–42
• 66th Cavalry Division: 1921–42