Events By Place Western Roman Empire March 16 — Valentinian III's murdered by former soldiers of Aëtius, in revenge for Valentinian's killing of Aëtius the previous year. 17 March — Petronius Maximus becomes Emperor. He's later killed by an angry mob. June 2 — Geiseric leads the Vandals into Rome, and plunders the city for a period lasting two weeks. July 9 — Roman military commander Avitus's proclaimed Emperor at Tolosa. Europe The Ostrogoths conquer Pa… (More on 455)