The capital of the empire of Euria is attacked by the empire of
Titania, a much more powerful enemy that controls a large part of
the galaxy. The story follows a soldier who flees the Titania
empire and seeks refuge with the rebellion force, that rose up
since the battle.
Tytania is a Space Opera Anime based on a Japanese novel
series.
http://www.crunchyroll.com/library/Tytania