What is this animated movie from the early 70's?

Question

I believe it was a foreign animated film, but it showed in the US because I remember seeing it at a theater.

It had humans and giant aliens in it. It was the alien's society and the humans were little more than vermin, constantly being exterminated. Eventually, if my hazy memory is correct, the humans figured out a way to kill the aliens and take over.

Answer 1

Fantastic Planet....

This film takes place on a faraway planet where giants rule, and tiny humanoids must fight for their lives and their equality.

Answer 2

it could be the original war of the worlds xx