After defeating Mark Antony and Cleopatra at Actium in 31 BC, Octavian was the only power left in the Roman world. He was careful not to repeat Caesar's mistakes.
In 27 BC he announced that he was handing the Republic back to the Senate and the people. The grateful Senate gave him the name Augustus, "the revered one", and asked him to keep command of most of the armies.
He called himself only princeps, the first citizen. But from then until his death in AD 14, Augustus held power over everything that mattered, and the Roman Empire had begun.
