Iron Sky

In the last moments of World War II, a secret Nazi space program evaded destruction by fleeing to the Dark Side of the Moon. During 70 years of utter secrecy, the Nazis construct a gigantic space fortress with a massive armada of flying saucers. When American astronaut James Washington puts down his Lunar Lander a bit too close to the secret Nazi base, the Moon Führer decides the glorious moment of retaking the Earth has arrived sooner than expected.