First Allied Airborne Army divisions were initially chosen to take part in Varsity: the British 6th Airborne Division, the US 13th Airborne Division and the US 17th Airborne Division, all of which were assigned to US XVIII Airborne Corps. One of these airborne formations, the British 6th Airborne Division, was a veteran division; it had taken part in Operation Overlord and the assault on Normandy. However, the 17th Airborne Division had only been activated in April 1943 and had arrived in Britain in August 1944, too late to participate in Operation Overlord. The division had also been absent from Operation Market-Garden, and the only
17th Airborne Division (United States) was inserted into the plans for the operation to support the amphibious assaults that would take place, which was code-named Operation Varsity. Three airborne divisions were initially chosen to take part in Varsity, these being the British 6th Airborne Division, the U.S. 13th Airborne Division and the 17th Airborne Division, all of which were assigned to the U.S. XVIII Airborne Corps. However, as planning for Operation Varsity began, it soon became obvious that there was a lack of suitable transport aircraft to transport all three airborne divisions. As such the 13th Airborne Division was dropped from the operational plan, primarily