Legend of the galactic heroes:

After donning the emperor’s crown, Reinhard becomes the target of an assassination plot. Knowing that the Church of Terra is behind it, he deploys his troops to the church’s holy land: Earth. Meanwhile, Yang’s leisurely retirement is tempered by the surveillance networks watching his every move from both sides. And when he is one day visited by a group of men dressed in black, the galaxy, too, relinquishes peace to become embroiled in upheaval once again. Welcome to the turning point in the war for the fate of the galaxy!