17th Airborne Division (United States) Standish on 12 August 1944 before departing Boston Port of Embarkation on 20 August 1944. The 17th Airborne Division arrived in the United Kingdom on 26 August. Once in Britain the division was attached to U.S. XVIII Airborne Corps, under Major General Matthew Ridgway, which commanded all American airborne formations, and which in turn became part of the First Allied Airborne Army when it was formed on 21 August, under the command of Lieutenant General Lewis H. Brereton. Although attached to XVIII Airborne Corps, the division was not chosen to participate in Operation Market Garden, a large-scale airborne operation intended
1st Airborne Task Force (Allied) land simultaneously in Normandy and in southern France in June 1944, attacking the Germans from the north and south in a classic pincer movement, after which the southern forces would head east to aid Allied forces in Italy. However it was soon realized that there were not enough landing ships or men available to carry out both operations at the same time, so the southern invasion ("Operation Anvil") was postponed. The southern invasion (now "Operation Dragoon") was planned for August 1944, and all airborne forces were allocated to a new unit formed on 11 July 1944 as the Seventh Army