<Ul> <Li> Other countries </Li> <Li> Atlas </Li> </Ul> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Pax Romana (Latin for "Roman Peace") was the long period of relative peacefulness and minimal expansion by the Roman military force experienced by the Roman Empire after the end of the Final War of the Roman Republic and before the beginning of the Crisis of the Third Century . During this time, the Roman empire reached its peak land mass area and its population grew up to 70 million people . Since it was established by Augustus, it is sometimes called Pax Augusta . Its span was approximately 206 years (27 BC to AD 180), from the time of Augustus becoming emperor to the death of Emperor Marcus Aurelius . </P>

Which describes a change that occured in rome about 100 b.c