This volume introduces the 'European Theater of Operation' series, providing background for study of all the campaigns in the ETO. It focuses on planning of Operation Overlord; D-day, the Normandy invasion; and tactical operations to July 1, 1944, when the Allies were assured of the success of Overlord invasion-the fruition of plans and preparations reaching back as far as January 1942. Like most of the campaign volumes in the 'European Theater of Operations' series, Cross-Channel attack focuses on the division as the basic fighting unit, although it often describes in considerable detail the experiences of battalions and companies on the fragmented fields of Normandy.