Just come in and mop up the Nazis and the empire of Japan - "Just get them on our way out".

The main reason we did not get involved in WWII is the main reason that we hear a lot of ing about the war right now - Pacifists would have had FDR's head on a stick. And their were many more Pacifists back then than there are now. It took a surprize attack on US soil to commit us to war, and then we went where it took to get the job done. And we didn't do a full-on frontal assault of Germany until 3 1/2 years later.
What did Argentina do in WWII? Were they involved in the fighting in Spain preceding WWII? (Those are sincere questions, don't get pissed off.)