United/Unis

Prime Minister Mackenzie King feared a repeat of the way the First World War divided Canada, when many French Canadians didn’t want to fight on behalf of Great Britain. They were furious when they were forced to through a program known as conscription. King promised not to use conscription this time around, and many French Canadians volunteered to serve in the military, often in French-speaking units. Others chose to serve in Canada rather than overseas.

But as the war dragged on, though, the government eventually broke its promise and brought in conscription.

Very few enemy spies were ever caught in Canada. Still, the government warned people to be careful about accidentally revealing information.