Fitzpatrick's War

It is the twenty-sixth century, and the world is a very different place. Gone are the United States and Canada, replaced by the socially rigid, authoritarian Confederacy of the Yukon. Gone too is the electronic age - destroyed in the apocalyptic Storm Times that devastated the globe and decimated the world's population in the late twenty-first century. It is now, once again, an age of steam, an age of lighter-than-air craft, an age of feudalism and knighthood, and for some, an age of conquest.
One of this new world's greatest heroes is Lord Isaac Prophet Fitzpatrick, Consul and Supreme Commander of the Yukon Confederacy in the early years of the twenty-fifth century. Tall, handsome, dashing, and noble, this young man who likened himself to Alexander the Great conquered the world in the name of the Yukons. And although his empire didn't last, Fitzpatrick is still revered by his people a century and a half after his untimely and mysterious death.
But now a document has surfaced - an intimate memoir written by one of Fitzpatrick's Basileis, his closest companions. This document promises to shed light on the most personal details of the life of this glorious Yukon hero. Its author, Sir Robert Mayfair Bruce, a Knight of the Field, seems to have been the most honest of men. Elevated from the ranks and brought into Fitzpatrick's inner circle, he owed everything to his mentor and Commander. And he was nothing if not loyal. As Fitzpatrick's chief engineer, Sir Robert Bruce did whatever Lord Fitzpatrick required. He designed the airfields in India from which the Yukons conquered China. He leveled jungles, built the staging grounds for Fitzpatrick's world war, even fought on the front lines, never questioning the authority of the great man he had come to love.
Why then do academics from the twenty-sixth century - decades after Sir Robert's death - seek so studiously to discredit this man who was Fitzpatrick's most trusted friend? Why do some call this memoir the work of a lying traitor?
Who was Isaac Prophet Fitzpatrick, really? Was he in fact the golden boy that History (that most revered of studies) paints him?