a period of peace that has been forced on a large area, such as an empire or even the whole world, by the most powerful nation of that time

Pax Romana (= the peace forced by Rome on its empire) 罗马帝国统治下的和平

The vice president promised that there would be no attempt to impose a Pax Americana on the region. 副总统承诺不会企图在该地区实行“美国强权统制的和平”。