Operation Overlord
The official American history describes the fighting beginning on 25 July as the "Northern France" campaign, and includes the fighting to close the Falaise Gap, which the British/Canadians/Poles consider to be part of the Battle of Normandy. Volume I of the "Official History of the Canadian Army in the Second World War," by C.P. Stacey, published in 1955, as well as the Canadian Army's official "Historical Summary of the Second World War," published in 1948, define the Battle of Normandy as lasting from 6 June 1944 to 1 September 1944. The definition of the Battle of Normandy is also evident in another publication by the Army's Historical Section, Canada's Battle in Normandy.