Although Canada had gained control of it's own foreign policy in 1931 from Great Britain, it was unreservedly committed to backing up the guarantee to Poland and Empire. As tensions in Europe rose in 1938 and 1939 Canada also prepared for war and when it came in September, the call went out to the British Empire and Canada answered.
Canada was to become the great training base for Empire countries and its' navy grew to be the 3rd largest in the world by the end of World War II. Canadian troops once again crossed the oceans to fight in Europe in addition to the Mediterranean and Asia. The long struggle began with the fall of Poland and France which left England and it's commonwealth standing alone against a fascist Europe. only In June of 1941 and then again in Dec were the Soviet Union and the US drawn into the conflict as allies and slowly the tide began to turn, The war changed Canada in many ways. It ended the depression, pulled Canada onto the word stage and set the stage for the longest and strongest economic boom in the nations history. Confidence and optimism were the watch words by 1945.