A Thracian by birth, he rose to power through military and administrative service. Marcian became emperor after marrying Pulcheria, sister of Theodosius II, ensuring legitimacy. His reign marked stability and fiscal responsibility; he refused to pay tribute to Attila the Hun, strengthening the empire’s finances. A devout Christian, he convened the Council of Chalcedon in 451, affirming Orthodox doctrine. Marcian’s leadership helped the Eastern Empire avoid the chaos that plagued the West, securing his legacy as a capable and principled ruler.