Galactica 1980 (1980)

"The great ship Galactica, our home for these many years we've endured the wilderness of space. And now, we near the end of our journey: we have, at last, found Earth."

30 years after the original Battlestar Galactica series. Upon reaching Earth, the inhabitants of the renegade starfleet take action when they realize earthlings aren't advanced enough to help battle the Cylons.