The 11th Airborne Division was a United States Army airborne formation, first activated on 25 February 1943, during World War II. Consisting of one parachute and two glider infantry regiments, with supporting troops, the division underwent rigorous training throughout 1943. It played a vital role in the successful Knollwood Maneuver, which was organized to determine the viability of large-scale American airborne formations after their utility had been called into question following a disappointing performance during the Allied invasion of Sicily.
The largest of these was located on the campus of the Agricultural College of the Philippines at Los Baños, some forty miles (64 km) south-east of Manila. General Douglas MacArthur had tasked the 11th Airborne Division with rescuing the Los Baños internees on 3 February, but the division's ongoing combat operations around the Genko Line left it unable to divert any resources at that time.[