What divides antarctica into eastern and western regions?

The continent is divided into two regions, known as East and West Antarctica. ... The two regions are separated by the Trans antarctic Mountains, a range that stretches across the entire continent, although sometimes covered by ice.

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.