Select two of the following roles performed by U.S. presidents: Chief executive Chief legislator Chief diplomat Commander in chief Briefly summarize each role and explain specific powers the president can use when assuming this role.

Rome began to lose territory after the Pax Romana because option B. expansive borders faced constant attack. The Pax Romana or Roman Peace, was a period of relative peace that lasted for almost 200 years, in the Roman Empire. It started with Augustus. Such a big empire was always subject to riots, rebellions, and insurrections which caused the loss of territory.