The reign of Augustus initiated an era of relative peace known as the Pax Romana (The Roman Peace).
Octavian found consul Mark Antony, Caesar's former colleague, in an uneasy truce with the dictator's assassins.
They had been granted a general amnesty on 17 March, yet Antony succeeded in driving most of them out of Rome.
Augustus dramatically enlarged the Empire, annexing Egypt, Dalmatia, Pannonia, Noricum, and Raetia; expanding possessions in Africa; expanding into Germania; and completing the conquest of Hispania.
Beyond the frontiers, he secured the Empire with a buffer region of client states and made peace with the Parthian Empire through diplomacy.
The Triumvirate was eventually torn apart by the competing ambitions of its members.