A because Aiken is More important when you
Look it up
He is referring to the bombing of Britain by Hitler's forces (also known as the Nazis). He was also said to have stated about this "It is not the size of the dog in the fight; but the size of the fight in the dog."
It looks like the cartoon is sort of mocking the Nazis. Or comparing it to America. You can tell my the symbol of the dude on the right’s shirt..