The history of Canada during World War II begins with the German invasion of Poland on 1 September 1939. While the Canadian Armed Forces were eventually active in nearly every theatre of war, most combat was centred in Italy, Northwestern Europe, and the North Atlantic. In all, some 1.1 million Canadians served in the Canadian Army, Royal Canadian Navy, Royal Canadian Air Force, and in forces across the empire, with approximately 42,000 killed and another 55,000 wounded. During the war, Canada was subject to direct attack in the Battle of the St. Lawrence, and in the shelling of a lighthouse at Estevan Point in British Columbia. The financial cost was $21.8 billion between 1939 and 1950. By the end of the war Canada had the world's fourth largest air force, and third largest navy. The Canadian Merchant Navy completed over 25,000 voyages across the Atlantic, 130,000 Allied pilots were trained in Canada in the British Commonwealth Air Training Plan. On D-Day, 6 June 1944 the 3rd Canadian Infantry Division landed on "Juno" beach in Normandy, in conjunction with allied forces. The Second World War had significant cultural, political and economic effects on Canada, including the conscription crisis in 1944 which affected unity between francophones and anglophones. The war effort strengthened the Canadian economy and furthered Canada's global position. Preparations Though Canada was the oldest Dominion in the British Empire, it was, for the most part, reluctant to enter the war. Canada, with a population somewhere between 11 and 12 million, eventually raised very substantial armed forces. Around 10% of the entire population of Canada joined the army, with only a small portion conscripted. After the long struggle of the Great Depression of the 1930s, the challenges of the Second World War accelerated Canada's ongoing transformation into a modern urban and industrialized nation. Canada informally followed the British Ten Year Rule that reduced defence spending even after Britain abandoned it in 1932. Having suffered from nearly 20 years of neglect, Canada's armed forces were small, poorly equipped, and for the most part unprepared for war in 1939. King's government began increasing spending in 1936, but the increase was unpopular. The government had to describe it as primarily for defending Canada, with an overseas war "a secondary responsibility of this country, though possibly one requiring much greater ultimate effort." The Sudeten crisis of 1938 caused annual spending to almost double. Nonetheless, in