眼鏡蛇行動
VII Corps played a major role in the Normandy landings in June 1944 and the subsequent Battle of Normandy, including Operation Cobra. Collins was a favorite of the 21st Army Group commander, General Sir Bernard Montgomery, who after Operation Goodwood laid the path for VII Corps to break out in Operation Cobra on 27 July 1944. After Cobra was the Battle of the Falaise Pocket, which completed the destruction of the Wehrmacht in Normandy, the corps then took part in the liberation of Paris and the Allied advance from Paris to the Rhine. In early September VIII Corps took approximately 25,000 prisoners during the Battle of the Mons Pocket. It later broke through the Siegfried Line and endured heavy fighting in the Battle of Hürtgen Forest. VII Corps later played a major role in the Battle of the Bulge, the largest battle on the Western Front during World War II, and finally took part in the Western Allied invasion of Germany. VII Corps is perhaps best known for the leading role it played in Operation Cobra; less well known is Collins' contribution to that plan.