Answer:
Pax Romans is a time for around 200 years that Rome experienced peace both internal and external. This does not mean that for 2 centuries there were no wars and no revolts but in contrast to the past and especially to the time after the 200 years it was as peaceful that it is ever going to get. The Roman Empire in this time had the most amount of land that it will ever have and had 1/3 of the world's population.
