There was a book and then a movie about aliens enslaving humans who rebelled but I can't remember its name.
One of my favorite "Star Trek Enterprise" episodes, "North Star", covers that also.
"Every record has been destroyed or falsified, every book rewritten, every picture has been repainted, every statue and street building has been renamed, every date has been altered. And the process is continuing day by day and minute by minute. History has stopped. Nothing exists except an endless present in which The Party is always right." - George Orwell, 1984