Headin' for God's Country (movie, 1943)

In this anti-Japanese WW II propaganda film, Japanese invaders attempt to raid Alaska and are totally obliterated. The trouble begins when a stranger visits a small town and tells them that the U.S. is going to be taken over by a powerful country. The story turns out to be true when the Japanese bomb Pearl Harbor. The town then rises up and slaughters a Japanese raiding party.