Likely the Eastern Romans' hostility to the Goths persuaded Alaric to search a new homeland in northern Italy, but Stilicho routed him at Pollentia on Easter Day 402. In 405, a Gothic chieftain Radagaisus led a mixed group of people into Italy. Stilicho enclosed and captured them with the support of Alans, Goths and Huns at Florence. In late 406, masses of Vandals, Alans, Suebi and other peoples stormed into Western Roman territory across the Rhine. Both migrations were probably triggered by the Huns' westward expansion. The Roman troops in Britain mutinied. One of their candidates to emperorship Constantine III consolidated his position and crossed the Channel into Gaul where he recruited new troops from among the invaders. As the bulk of the Roman garrisons accompanied Constantine to Gaul, raiders from Ireland launched regular attacks against Britain. Alaric resumed the attacks against northern Italy and Noricum and demanded 4,000 pounds of gold for a peace treaty. The senators preferred to resist, but Stilicho paid the tribute because he wanted to seize Illyricum from the Eastern Romans with Alaric's support.