Marcian undid many of the acts of TheodosiusII in the Romans' relations with the Huns (led by Attila) and in the organization of the Christian Church. Marcian soon broke all treaties with Attila, ending all subsidy payments to him. In 452, while Attila and the Huns were attacking the Italian Peninsula (part of the western Roman Empire), Marcian's armies attacked across the Danube river into the Great Hungarian Plain. There the Roman armies overcame the Huns in their own country. Because of this, and because of a famine and epidemic in northern Italy, the western Roman Empire was able to bribe Attila into retreating from the Italian Peninsula.