first barbarian king of Italy. The date on which he assumed power, 476, is traditionally considered the end of the Western Roman Empire.

Odoacer was a German warrior, the son of Idico (Edeco) and probably a member of the Sciri tribe. About 470 he entered Italy with the Sciri; he joined the Roman army and rose to a position of command. After the overthrow of the Western emperor Julius Nepos by the Roman general Orestes (475), Odoacer led his tribesmen in a revolt against Orestes, who had reneged on his promise to give the tribal leaders land in Italy. On Aug. 23, 476, Odoacer was proclaimed king by his troops, and five days later Orestes was captured and executed in Placentia (now Piacenza), Italy. Odoacer then deposed and exiled Orestes' young son, the emperor Romulus Augustulus.

Odoacer's aim was to keep the administration of Italy in his own hands while recognizing the overlordship of the Eastern emperor, Zeno. Zeno granted him the rank of patrician, but Odoacer styled himself “King.” He refused to acknowledge Julius Nepos, Zeno's candidate, as Western emperor.

Odoacer introduced few important changes into the administrative system of Italy. He had the support of the Senate at Rome and, apparently without serious opposition from the Romans, was able to distribute land to his followers. Unrest among the German tribesmen led to violence in 477–478, but evidently no such disturbances occurred during the later period of his reign. Although Odoacer was an Arian Christian, he rarely intervened in the affairs of the Roman Catholic church.

In 480 Odoacer invaded Dalmatia (in present Croatia) and within two years conquered the region. When Illus, master of soldiers of the Eastern Empire, begged Odoacer's help (484) in his struggle to depose Zeno, Odoacer attacked Zeno's westernmost provinces. The emperor responded by inciting the Rugi (of present Austria) to attack Italy. During the winter of 487–488 Odoacer crossed the Danube and defeated the Rugi in their own territory. Although he lost some land to the Visigothic king Euric, who overran northwest Italy, Odoacer recovered Sicily (apart from Lilybaeum) from the Vandals. Nevertheless, he proved to be no match for the Ostrogothic king Theodoric, who was appointed king of Italy by Zeno in 488 in order to prevent the Ostrogoths from raiding in the Eastern Empire. Theodoric invaded Italy in 489 and by August 490 had captured almost the entire peninsula, forcing Odoacer to take refuge in Ravenna. The city surrendered on March 5, 493; Theodoric invited Odoacer to a banquet and there killed him.