Legend of the galactic heroes:

The “golden brat” Reinhard von Lohengramm, a military prodigy and admiral of the Galactic Empire, has ambitions beyond protecting the borders or even defeating the empire’s enemies. He seeks to overthrow the old order and become a truly absolute—yet benevolent—dictator. His rival, the humble Yang Wen-li of the Free Planets Alliance, wishes to preserve democracy even if he must sacrifice his political ideals to defeat the empire. Their political and military battles play out over a galactic chessboard in an epic saga fifteen centuries in the making!