a coalition of forces, including Visigoths and Burgundians, and raced to prevent Attila from taking the city of Aurelianum (Orléans), successfully forcing the Huns to beat a hasty retreat. The Roman-Germanic forces met Hunnic forces at the Battle of the Catalaunian Plains, resulting in a victory for Aetius, who sought to retain his position by allowing Attila and a significant number of his troops to escape. This allowed Attila to regroup, and, in 452, Attila invaded Italy. He sacked and destroyed Aquileia and took Verona and Vincentia (Vicenza) as well. Aetius was shadowing the Huns but did not have the troops to attack, so the road to Rome was open. Although Ravenna was Valentinian's usual residence, he and the court eventually moved back to Rome, where he was as Attila approached. Valentinian sent Pope Leo I and two leading senators to negotiate with Attila. This embassy, combined with a plague among Attila's troops, the threat of famine, and news that the Eastern Emperor Marcian had launched an attack on Hun homelands along the Danube, forced Attila to turn around and leave Italy. The death of Attila in Pannonia in 453 and the power struggle that erupted between his sons ended the Hunnic threat to the empire. Assassination With the Hun invasion thwarted, Valentinian felt secure enough to begin plotting to have Aetius killed, egged on by Petronius Maximus, a high ranking senator who bore Aetius a personal grudge, and his chamberlain, the eunuch Heraclius. Aetius, whose son had married Valentinian's youngest daughter, Placidia, was murdered by Valentinian on 21 September 454. The ancient historian Priscus reported that Aetius was presenting a financial statement before the Emperor when Valentinian suddenly leapt from his throne and accused him of drunken depravity. He held him responsible for the empire's tribulations and accused him of plotting to take the empire away from him. Valentinian then drew his sword and together with Heraclius, rushed at the weaponless Aetius and struck him on the head, killing him on the spot. When Valentinian later boasted that he had done well to dispose of Aetius in such a way, a counsellor famously replied "Whether well or not, I do not know. But know that you have cut off your right hand with your left." On March 16 of the following year, indeed, the emperor himself was assassinated in Rome by two Scythian followers of Aetius: Optelas and Thraustelas.