Attila the Hun was one of the most successful barbarian rulers of the Hunnic Empire, attacking the Eastern and Western Roman empires.

Who Was Attila the Hun? Attila the Hun, 5th-century king of the Hunnic Empire, devastated lands from the Black Sea to the Mediterranean, inspiring fear throughout the late Roman Empire. Dubbed "Flagellum Dei" (meaning "Scourge of God" in Latin), Attila consolidated power after murdering his brother to become sole ruler of the Huns, expanded the rule of the Huns to include many Germanic tribes and attacked the Eastern Roman Empire in wars of extraction. He never invaded Constantinople or Rome, and left a divided family following his death in 453.

Early Life and Taking Control of the Hunnic Empire Born in Pannonia, a province of the Roman Empire (present-day Transdanubia, Hungary), circa 406, Attila the Hun and his brother, Bleda, were named co-rulers of the Huns in 434. Upon murdering his brother in 445, Attila became the 5th-century king of the Hunnic Empire and the sole ruler of the Huns. Attila united the tribes of the Hun kingdom and was said to be a just ruler to his own people. But Attila was also an aggressive and ruthless leader. He expanded the rule of the Huns to include many Germanic tribes and attacked the Eastern Roman Empire in wars of extraction, devastating lands from the Black Sea to the Mediterranean, and inspiring fear throughout the late Roman Empire.

Wrath of Attila the Hun Attila was notorious for his fierce gaze; according to historian Edward Gibbon, he frequently rolled his eyes "as if to enjoy the terror he inspired." He also reputedly scared others by claiming to own the actual sword of Mars, the Roman god of war. In 434, Roman Emperor Theodosius II paid a tribute—in essence, protection money—to Attila, but Attila broke the peace treaty, destroying towns along the Danube river before moving into the empire's interior and obliterating Naissus and Serdica. He then moved toward Constantinople (present-day Istanbul), defeating the main Eastern Roman forces in a number of battles. However, upon reaching the sea both north and south of Constantinople, Attila realized the impossibility of an attack on the capital's great walls by his army, which consisted largely of horsemen. Theodosius II had specifically built the great walls to defend against Attila. Subsequently, Attila retargeted and destroyed what was left of the Eastern Roman Empire's forces. In 441, Attila invaded the Balkans. When Theodosius begged for terms, Attila's tribute was tripled, but, in 447, he struck the empire again and negotiated yet another new treaty. When the new Eastern Roman emperor, Marcian, and Western Roman Emperor Valentinian III, refused to pay tribute, Attila amassed an army of half a million men and invaded Gaul (now France). He was defeated at Chalons in 451 by Aetius, who had banded together with the Visigoths.