When Attila died in 453, it was the downfall of the Huns' power. Marcian improved the Romans' position by allowing Germanic peoples to live in Roman lands as allies. They did military service in exchange for this right. Marcian called together the Council of Chalcedon, which agreed that Jesus had two "natures": divine and human. This made the populations of Roman Syria and Roman Egypt Marcian's enemies. People in these places did not agree with this official Christology. 