The 11th Airborne Division ("Arctic Angels") is a United States Army multirole infantry division made up of specialized light infantry and airborne infantry based in Alaska.

Currently, this unit specializes in arctic warfare, airborne operations, combined arms, maneuver warfare, and urban warfare.

First activated on 25 February 1943, during World War II, it was held in reserve in the United States until June 1944 when it was transferred to the Pacific Theater where it saw combat in the Philippines. On 30 August 1945 the division was sent to southern Japan as part of the occupation force where it remained for four years. One parachute infantry regiment was detached for service in the Korean War. On 30 June 1958 the division was inactivated.

In the summer of 2022 the U.S. Army Alaska headquarters was redesignated as the 11th Airborne Division, and the two Brigade Combat Teams in Alaska, the 1st Brigade Combat Team and 4th Brigade Combat Team, 25th Infantry Division, were transferred to the 11th Airborne Division and redesignated as the 1st and 2nd Infantry Brigade Combat Team of the 11th Airborne Division.

Inspired by the pioneering German use of large-scale airborne formations during the Battle of France in 1940 and later the invasion of Crete in 1941, the various Allied powers decided to raise airborne units of their own. One of the resultant five American and two British airborne divisions, the 11th Airborne Division, was officially activated on 25 February 1943 at Camp Mackall in North Carolina, under the command of Major General Joseph Swing. As formed, the division consisted of the 511th Parachute Infantry Regiment, the 187th Glider Infantry Regiment and the 188th Glider Infantry Regiment, and with a complement of 8,321 men was around half the strength of a regular U.S. infantry division of World War II.

The division initially remained in the United States for training, which in common with all airborne units was extremely arduous to befit their elite status. Training included lengthy forced marches, simulated parachute landings from 34-and-250-foot (10 and 76 m) towers, and practice jumps from transport aircraft; hesitancy in the doorway of an aircraft resulted in an automatic failure for the candidate. The washout rate was high, but there was never a shortage of candidates, especially because in American airborne units the rate of pay was much higher than that of an ordinary infantryman.

Before training was complete a debate developed in the U.S. Army over whether the best use of airborne forces was en masse or as small, compact units. On 9 July 1943, the first large-scale Allied airborne operation was carried out by elements of the U.S. 82nd Airborne Division and the British 1st Airborne Division in support of the Allied invasion of Sicily, code-named Operation Husky. The 11th Airborne Division commanding general, Swing, was temporarily transferred to act as airborne advisor to General Dwight D. Eisenhower for the operation and observed the airborne assault which went badly. The 82nd Airborne Division had been inserted by parachute and had suffered high casualties, leading to a perception that it had failed to achieve many of its objectives.

Eisenhower reviewed the airborne role in Operation Husky and concluded that large-scale formations were too difficult to control in combat to be practical. Lieutenant General Lesley J. McNair, the overall commander of Army Ground Forces, had similar misgivings: once an airborne supporter, he had been greatly disappointed by the performance of airborne units in North Africa and more recently Sicily. However, other high-ranking officers, including the Army Chief of Staff George Marshall, believed otherwise. Marshall persuaded Eisenhower to set up a review board and to withhold judgement until the outcome of a large-scale maneuver, planned for December 1943, could be assessed.