Here is a picture of American military propaganda from WWI. The Hun is a nickname for the Germans.

The entire class:

TO DEFEAT THE HUNS. DID THEY SEND ME DAUGHTERS, WHEN I ASKED FOR SONS? YOUR THE SADDEST BUNCH I'VE EVER MET, BUT YOU CAN BET BEFORE WE'RE THROUGH. MISTER, I'LL MAKE A MAN OUT OF YOU.