The Shadow of Ararat [first edition]

In what would be A.D. 600 in our history, the Roman Empire still stands, supported by the twin pillars of the Legions and Thaumaturges of Rome. Now the Emperor of the West, the Augustus Galen Atreus, will come to the aid of the Emperor of the East, the Augustus Heraclius, to lift the siege of Constantinople and carry a great war to the very doorstep of the Shahanshah of Persia. It is a war that will be fought with armies both conventional and magical, with bright swords and the darkest necromantic sorceries.