The Anvil Book III of The General - S. M. Stirling - David Drake 1993
With the aid of a sentient battle computer from before the collapse of interstellar civilization, Raj Whitehall has come close to reuniting the entire planet of Bellevue.
Raj is loved by the people, who hold him in awe, but the half-mad jealousy and fear of his emperor is about to force Raj to revolt or face death by torture.
