A Wizard in War (Chronicles of the Rogue Wizard)

The medieval planet of Maltroit seems to be repeating Earth's bloody history in the worst possible manner: endless feudal warfare, at the peasants' expense. It's up to the Rogue Wizard to give the downtrodden a crash course in revolution, so before you can say "Magna Carta," he's bent the course of history by teaching the nobles the rudiments of democracy, and schooling the peasants in the basics of radical politics.