Little known fact: without the aid of the Wookiee army of Kashyyyk, it’s very likely that the U.S. and the allied forces would have been unable to control the Nazi advancement. While the Wookiee’s intervention is still kept out of most textbooks, most historians have come to accept our nasty little secret.
But why would Chewbacca choose to help little ole Earth with the Fuhrer’s demise? Let’s put it this way. Before registering on his way through Ellis Island, his name was Jewbacca.