WWII Propaganda Poster

This is a little something that I did for history class. We were tasked with designing a propaganda poster that could be used in Canada during World War II, and this is what I've come up with. It's targeted towards people aged 17 and up (the age demographic that is eligible to join the military), and is meant to show how much of a threat the Nazis would be if they ever managed to attack Canada (the main idea is to encourage people to join the military and fight in the war). I think it turned out pretty nice. What do you think? Does this seem like something that the government would actually use to entice people to join the war? If so, how effective do you think it would be?