Day of the Tyrant — Jerry Pournelle

"From the dark pit of our own barbaric souls the tyrants are summoned. Brutal masters of our own monstrous making, they will hammer the universe into submission, until their merciless domination extends beyond the rim of space, and whole galaxies quail before the dawning of the day of the tyrant. Only the best and the bravest of the generations to come can resist their iron will, their terrible violence. With defiant hearts that thrill to Freedom's wild battle cry, these few will fight the oppressors to a standstill, sacrificing their lives so that their people may have the stars."