It's the Galactic Empire versus the Free Planets Alliance in Japan's greatest space opera epic

In the thirty-sixth century, humanity has conquered the galaxy and colonized countless star systems. The Galactic Empire, modeled along Prussian lines, and the democratic Free Planets Alliance are at war, and the fate of every human being in the universe hangs in the balance. This classic Japanese space opera, adapted into a legendary anime, is finally available in English for the first time.

Imperial forces have captured the Phezzan Dominion and draw ever closer to the Free Planets...