Der Fuehrer’s Face (1943) — Donald Duck Theatrical Cartoon Series
This short places Donald as a worker dreaming of freedom during the golden age of Nazi Germany. A German “oom-pah” band parades through town extolling the “virtues” of the Fuehrer with the title song. They awaken Donald Duck, who has to go to work in a Nazi munitions factory, much to his regret.
Luckily in the end, after a frantic workday trying to alternate between making bombs and saluting Hitler, he finds that it has all been a nightmare and that he is still living in the good old U.S.A.
Watch “Der Fuehrer’s Face” on video at Big Cartoon DataBase