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
First Allied Airborne Army when a major offensive was launched by the Germans on the orders of Adolf Hitler; on 16 December 1944 Operation ""Watch on the Rhine" began, with three German armies attacking through the Ardennes, hundreds of thousands of German troops and tanks breaking through Allied line on the American sector. The operation took the Allied forces completely by surprise, and several units under the command of First Allied Airborne Army became involved in the Allied attempt to first halt, and then repel the offensive; these units were principally the 101st Airborne Division, 82nd Airborne Division and the 6th Airborne Division. With