Lucifer's Star by C.T. Phipps
Cassius Mass was the greatest star pilot of the Crius Archduchy. He fought fiercely for his cause, only to watch his nation fall to the Interstellar Commonwealth. It was only after that he realized the side he’d been fighting for was the wrong one. Now a semi-functional navigator on an interstellar freight hauler, he tries to hide who he was and escape his past. Unfortunately, some things refuse to stay buried and he ends up conscripted by the very people who destroyed his homeland.
LUCIFER’S STAR is the first novel of the Lucifer’s Star series, a dark science fiction space opera set in a world of aliens, war, politics, and slavery.