Aegidius was ruler of the Kingdom of Soissons from 461–464/465 AD. Before his ascension, he became magister militum in Gaul, serving under Aetius, in 458 AD. An ardent supporter of Majorian, Aegidius rebelled against Ricimer when he deposed Majorian. Aegidius launched several campaigns against the Visigoths from northern Gaul, forming the Kingdom of Soissons from the lands he conquered. He died suddenly after a major victory against the Visigoths, and was succeeded by his son Syagrius.