The Byzantine general Belisarius (ca. 506-565) is one of the great commanders of history. He demonstrated that military skill and discipline could enable small or motley armies to win remarkable victories.

Originally from the Balkans, Belisarius rose to prominence in the imperial bodyguard and was advanced to high military command while still in his 20s. He won outstanding success in the war fought with Persia early in Justinian's reign. He further gained the Emperor's confidence through his loyalty during the Nika riots of 532, during which he commanded the massacre of the rioters. In addition, Belisarius married Antonina, a friend of Empress Theodora. His wife, though unfaithful and often embarrassing to him, had great influence at court, which was valuable when Justinian grew suspicious of him. Although Belisarius seems never to have been disloyal, Justinian was always fearful that so popular a commander might attempt to seize the throne...