magister officiorum and replaced Stilicho as the power behind the throne. His new government was strongly anti-Germanic and obsessed with purging any and all of Stilicho's former supporters. Roman soldiers began to indiscriminately slaughter allied barbarian foederati soldiers and their families in Roman cities. Thousands of them fled Italy and sought refuge with Alaric in Noricum. Zosimus reports the number of refugees as 30,000, but Peter Heather and Thomas Burns believe that number is impossibly high. Heather argues that Zosimus had misread his source and that 30,000 is the total number of fighting-men under Alaric's command after the refugees joined Alaric. Second Visigothic invasion of Italy First siege of Rome Attempting to come to an agreement with Honorius, Alaric asked for hostages, gold, and permission to move to Pannonia, but Honorius refused. Alaric, aware of the weakened state of defenses in Italy, invaded in early October, six weeks after Stilicho's death. He also sent word of this news to his brother-in-law Ataulf asking him to join the invasion as soon as he was able with reinforcements. Alaric and his Visigoths sacked Ariminum and other cities as they moved south. Alaric's march was unopposed and leisurely, as if they were going to a festival, according to Zosimus. Sarus and his band of Goths, still in Italy, remained neutral and aloof. The city of Rome may have held as many as 800,000 people, making it the largest in the world at the time. The Goths under Alaric laid siege to the city in late 408. Panic swept through its streets, and there was an attempt to reinstate pagan rituals in the still religiously mixed city to ward off the Visigoths. Pope Innocent I even agreed to it, provided it be done in private. The pagan priests, however, said the sacrifices could only be done publicly in the Roman Forum, and the idea was abandoned. Serena, the wife of the proscribed Stilicho and a cousin of emperor Honorius, was in the city and believed by the Roman populace, with little evidence, to be encouraging Alaric's invasion. Galla Placidia, the sister of the emperor Honorius, was also trapped in the city and gave her consent to the Roman Senate to execute Serena. Serena was then strangled to death. Hopes of help from the Imperial government faded as the siege continued and Alaric took control of the Tiber River, which cut the supplies going into