HARLOCK: SPACE PIRATE

Many years into the future, battle has been raging across the galaxies as 500 billion humans, whose forebears were exiled from Earth, plan to return to what is still called home. Forced to flee a ravaged Earth, humans have now depleted the corners of the galaxy to which they fled. Earth has now become the most valued and precious resource of all, controlled by the corrupt Gaia Coalition which governs the human race across the different galaxies. Captain Harlock and his trusted crew are the only hope mankind has of discovering the secrets that the Gaia have kept hidden. — Description from AniList community (anilist.co).