The situation became more critical in 408, after the death of Stilicho, a general who tried to reunite the Empire and repel barbarian invasion in the early years of the 5th century. The professional field army collapsed. In 410, the Theodosian dynasty saw the Visigoths sack Rome. During the 5th century, the Western Empire experienced a significant reduction of its territory. The Vandals conquered North Africa, the Visigoths claimed the southern part of Gaul, Gallaecia was taken by the Suebi, Britannia was abandoned by the central government, and the Empire suffered further from the invasions of Attila, chief of the Huns. General Orestes refused to meet the demands of the barbarian "allies" who now formed the army, and tried to expel them from Italy. Unhappy with this, their chieftain Odoacer defeated and killed Orestes, invaded Ravenna and dethroned Romulus Augustus, son of Orestes. This event of 476, usually marks the end of Classical antiquity and beginning of the Middle Ages. The Roman noble and former emperor Julius Nepos continued to rule as emperor from Dalmatia even after the deposition of Romulus Augustus until his death in 480. Some historians consider him to be the last emperor of the Western Empire instead of Romulus Augustus.