The Boys From Brazil (1978)

"A Nazi hunter in Paraguay discovers a sinister and bizarre plot to rekindle the Third Reich."

Only it's not so bizarre because some of the Nazi's ended up in the USA under project Paperclip, some ended up going to Argentina (Hitler), some ended up going to Antarctica (which is why the Pope, John Kerry, and Barrack Obama visited there in I believe 2013), and some of them ended up on the moon.

Truth IS stranger than fiction.