His career coincided with Rome's momentous change from a republic to an empire. An officer in the republican army defeated at the Battle of Philippi in 42 BC, he was befriended by Octavian's right-hand man in civil affairs, Maecenas, and became a spokesman for the new regime. For some commentators, his association with the regime was a delicate balance in which he maintained a strong measure of independence (he was "a master of the graceful sidestep") but for others he was, in John Dryden's phrase, "a well-mannered court slave".