It's the story of a 13th-century Russian prince who rallies his people to defend their homeland against the Teutonic Knights. The invaders are not only German, but Roman Catholic, too, and the film paints that religion in as poor a light as possible. Roman Catholic priests nod with approval as the Teutonic Knights throw naked Russian children into a bonfire to be burned alive. It's powerful stuff, and I can only imagine how effective it was for a people already predisposed to hate the Germans.
The score is, quite simply, awesome. It was composed by Sergei Prokofiev, and he really nailed the battle scene. But don't take my word for it. See for yourself. It's incredible stuff.
And now... the Battle On The Ice.
(Psst... crank the volume up. ;))