Aléxander Nevsky

Sergei Eisenstein's "Alexander Nevsky" is a biopic of the famous prince, but when released it was seen as an expression of the growing suspicion of Nazi Germany. Indeed, the battle scenes make the Teutonic Knights - aka the Germans - get depicted as faceless goons who have no qualms about killing anyone. The epic battle scene is probably the most well remembered scene in the movie. It basically says "If you invade Russia, expect the same fate as befell the Teutonic Knights." Hitler didn't heed the warning, and his hoped-for thousand-year Reich only lasted twelve years (the harsh winters didn't help matters).

Understanding that it's a form of propaganda, it's an impressive movie. I wouldn't expect otherwise from Eisenstein. If you're going to teach a course on Russian cinema, you would have to include this one. Excellent movie.