Uldin's royal power gradually weakened in his last years. Between 408-410, the Huns were largely inactive. As allies of the Western Roman Empire, they did not attack the Visigoths of Alaric I in Pannonia Secunda and Pannonia Savia because they fought under Uldin in Illyricum and Thrace. Some Hun garrisons were in the Roman army led by Stilicho, and in Ravenna. In the summer of 409, a Hunnic army numbering 10,000 men was called into assistance by Honorius, but did not stop Alaric I from sacking Rome. Zosimus records that in late 409 some groups of Huns joined the Visigoths from Pannonia Prima who rode to Italy.