The aggressions of the two Ostrogothic leaders, Theoderic the Amal (Theoderic the Great), the son of Theodemir and leader of the Moesian Ostrogoths, and Theodoric Strabo, the leader of the Thracian Ostrogoths, had been a constant source of danger since 472. Although Zeno at times contrived to play them off against each other, they in turn were able to profit by his dynastic rivalries. It was only by offering them pay and high command that he kept them from attacking Constantinople itself.