101st Airborne Division coast and strengthened the paratrooper positions, many were relieved and sent to the rear to organize for the next big paratroop operation. On 17 September 1944, the 101st Airborne Division became part of XVIII Airborne Corps, under Major General Matthew Ridgway, part of the First Allied Airborne Army, commanded by Lieutenant General Lewis H. Brereton. The division took part in Operation Market Garden (17–25 September 1944), an unsuccessful Allied military operation under Field Marshal Bernard Montgomery, commander of the Anglo-Canadian 21st Army Group, to capture Dutch bridges over the Rhine fought in the Netherlands and the largest airborne operation of
6th Airborne Division advance to the River Seine heavy anti-aircraft artillery regiment used in a field artillery role. In the operation the 6th Airborne Division together with the 7th Armoured Division, the 49th (West Riding) Infantry Division and the 51st (Highland) Infantry Division, formed the I Corps, attached to the First Canadian Army. When issuing his orders, Lieutenant General John Crocker, the Corps commander, aware that the 6th Airborne had almost no artillery, vehicles or engineer equipment, did not expect them to advance quickly. To reach the River Seine the division would have to cross three main rivers, along only two main lines of advance. One route was