disposing of Aetius, someone at court responded, "Whether well or not, I do not know. But know that you have cut off your right hand with your left." Edward Gibbon credits Sidonius Apollinaris with this famous observation. Maximus expected to be made patrician in place of Aetius, but was blocked by Heraclius. Seeking revenge, Maximus arranged with two Huns who were friends of Aetius, Optila and Thraustila, to assassinate both Valentinian III and Heraclius. On 16 March 455, Optila stabbed the emperor in the temple as he dismounted in the Campus Martius and prepared for a session of archery practice. As the stunned emperor turned to see who had struck him, Optila finished him off with another thrust of his blade. Meanwhile, Thraustila stepped forward and killed Heraclius. Most of the soldiers standing close by had been faithful followers of Aetius, and none lifted a hand to save the emperor. Legacy Military legacy Aetius is generally viewed as a great military commander – indeed, he was held in such high esteem by the Eastern Roman Empire that he became known as the last true Roman of the west. Traditionally, historians also consider the Battle of the Catalaunian Plains as decisively important, crippling Attila by destroying his aura of invincibility. Gibbon eloquently states this view: Aetius effectively ruled the western empire from 433 to 454, and attempted to stabilize its European borders under a deluge of barbarians, foremost of which were Attila and the Huns. One of his greatest achievements was the assembling of the coalition against Attila. Regarding this, historian Arther Ferrill states: While J. B. Bury viewed Aetius as a great military commander and a prominent historical figure, he did not consider the battle itself to be particularly decisive. He argues that Aetius attacked the Huns when they were already retreating from Orléans (so the danger to Gaul was departing anyway); and he declined to renew the attack on the Huns next day, precisely in order to preserve the balance of power. (Others suggest that the Huns may have abandoned the siege of Orléans because Aetius's armies were advancing on them.) Bury suggests that the Germanic victory over the Huns at the Battle of Nedao, three years later, was more important. This determined that there would be no long-term Hun empire in Europe, which Bury thinks would have been unlikely even if they had crushed the Germanic tribes on