In 52 BC another, larger revolt erupted in Gaul, led by Vercingetorix of the Arverni. Vercingetorix managed to unite the Gallic tribes and proved an astute commander, defeating Caesar in several engagements including the Battle of Gergovia, but Caesar's elaborate siege-works at the Battle of Alesia finally forced his surrender. Despite scattered outbreaks of warfare the following year, Gaul was effectively conquered.