Legend of the Galactic Heroes is a series of science fiction novels by Yoshiki Tanaka. An anime adaptation of the novels by Artland ran from 1988 to 2000 as well as a manga based on the novels, with art by Katsumi Michihara. There have also been several video game adaptations with the most recent release in 2008 being a real time simulation.
Neither the novels, anime, nor manga have been released officially in the English language. However, there have been English fan translations.
Set somewhere in distant space around the 35th century (the late eighth century of the story's "Space Era"), Legend of the Galactic Heroes is a story of the epic struggle between the monarchic Galactic Empire and the democratic Free Planets Alliance.
The original Japanese title is often abbreviated as Gin'eiden in Japan, while English-language fans often abbreviate the series title as LOGH (capitalization for the acronym varies).
Source: http://en.wikipedia.org/wiki/Legend_of_the_Galactic_Heroes