After attaining power, Augustus set about reforming the Empire.

The Senate bestowed upon Octavian the title Caesar Augustus during the constitutional settlement of 27 BC. Four years later Augustus and the Senate altered their power sharing agreement.

On Sept 2, 31 BC Octavian defeated Antony at the Battle of Actium. Antony and Cleopatra fled back to Alexandria where they committed suicide the next year, following Octavian's invasion of Egypt.

After Antony failed to conquer Parthia, the Triumvirate partnership broke down, leading to a declaration of war.

After winning the Battle of Philippi Antony and Octavian divided the empire into two halves. Antony took control of the east where he formed an alliance with Cleopatra, while Octavian commanded the west.

Caesar posthumously adopted his great nephew Gaius Octavius and the 19-year-old was thrust into the center of Roman politics. In the months following the assassination Octavian and Mark Antony vied for the support of the legions.

In the last months of his life, rumors swirled about Caesar's monarchical ambitions. On the Ides of March 44 BC, a group of Senators put the issue to rest by assassinating Caesar during a session of the Senate.

Caesar took the overland route back from Egypt back to Rome and along the way pacified what little resistance he came across. After a brief stay in Italy he sailed for North Africa where he defeated the regrouped Republican army. Having emerged from the Civil War triumphant he returned to Rome and began his ambitious reform programs.

Following a setback at Dyrrachium, Caesar decisively won the Battle of Pharsalus in 48 BC. After defeating Pompey, Caesar sailed for Alexandria, where settled a civil war by placing Cleopatra on the throne.