In 494 BC, the city was at war with two neighboring tribes. The plebeian soldiers refused to march against the enemy, and instead seceded to the Aventine Hill. The plebeians demanded the right to elect their own officials. The patricians agreed, and the plebeians returned to the battlefield. The plebeians called these new officials "plebeian tribunes". The tribunes would have two assistants, called "plebeian aediles". During the 5th century BC, a series of reforms were passed. The result of these reforms was that any law passed by the plebeian would have the full force of law. In 443 BC, the censorship was created. From 375 BC to 371 BC, the republic experienced a constitutional crisis during which the tribunes used their vetoes to prevent the election of senior magistrates.