 Under Caesar, a significant amount of authority was vested in his lieutenants, mostly because Caesar was frequently out of Italy.In October 45 BC, Caesar resigned his position as sole consul, and facilitated the election of two successors for the remainder of the year, which theoretically restored the ordinary consulship, since the constitution did not recognise a single consul without a colleague.Near the end of his life, Caesar began to prepare for a war against the Parthian Empire.