Octavian's rise to power signaled an end to the roman republic yet the beginning of the age of exploration pax romana the triumverate the decline of rome

Octavian, or Augustuc Caesar, is known as the first Roman Emperor, which means the age of the Roman Republic came to end  with his rule. Octavian also presided over the beginning of Pax Romana, a long age of relative peace secured by the power of the Roman Empire.