Glycerius was Roman emperor of the West from 473 to 474. He served as comes domesticorum during the reign of Olybrius, until Olybrius died in November 472. After a four-month interregnum, Glycerius was proclaimed as emperor in March 473 by Gundobad, the magister militum and power behind the throne. Very few of the events of his reign are known other than that an attempted invasion of Italy by the Visigoths was repelled by local commanders, diverting them to Gaul. Glycerius also prevented an invasion by the Ostrogoths through diplomacy, including a gift of 2,000 solidi.

Anicius Olybrius was Roman emperor from July 472 until his death later that same year; his rule as augustus in the western Roman Empire was not recognised as legitimate by the ruling augustus in the eastern Roman Empire, Leo I. He was in reality a puppet ruler raised to power by Ricimer, the magister militum of Germanic descent, and was mainly interested in religion, while the actual power was held by Ricimer and his nephew Gundobad.