In 370 BC, the Roman colonists of Velitrae made several incursions into Roman territory and besieged Tusculum, knowing that Rome did not have an army because the plebeian tribunes had paralysed the Roman state. Thereafter, the tribunes allowed the election of heads of state and the levy on an army, which drove the rebels from Tusculum and laid in a protracted siege on Velitrae. Livy did not state when it ended, but it must have been in 366 BC. In 367 BC, the rebels arrived in Latium. An aging Camillus defeated them near the Alban Hills, and most of the rebels then fled to Apulia.