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.
The correct option is THE AGE OF PAX ROMANA. This was the time period after Octavian has conquered Anthony and Cleopatra and he become an Emperor. This was around 27 BCE. The period was of relative peace as no war was fought during that period.
The Great Wall of China's history began in the Spring and Autumn Period (770–476 BC), was first completed in the Qin Dynasty (221–206 BC), and was last rebuilt as a defense in the Ming Dynasty (1368–1644).
