In 51 BC and 50 BC, there was little resistance, and Caesar's troops were mostly mopping up. Gaul was conquered, although it would not become a Roman province until 27 BC, and resistance would continue until as late as 70 AD. There is no clear end-date for the war, but the imminent Roman Civil War led to the withdrawal of Caesar's troops in 50 BC. Caesar's wild successes in the war had made him extremely wealthy and provided a legendary reputation. The Gallic Wars were a key factor in Caesar's ability to win the Civil War and declare himself dictator, in what would eventually lead to the end of the Roman Republic and the establishment of the Roman Empire.