Canada's greatest contribution to World War Two would be the British Commonwealth Air Training Plan(BCATP). This was a training program for pilots in the war. They needed more pilots for the war. The British expected that the Royal Air Force (RAF) would absorb not only commonwealth air training graduates without restrictions, but also Canadian graduates. Instead, the Prime minister Mackenzie King demanded that Canadians be identified as members of the Royal Canadian Air Force (RCAF), by their shoulder badge. The first recruits were accepted into the program on 29 April, 1940, and the plan remained in effect until 31 March, 1945. This took a lot of money Canadians had to pay for through taxes and victory bonds. Prime Minister Mackenzie King
