Explanation:
Sectarianism is a political or cultural conflict between two groups often related to the form of government they live under. ... Common examples of these divisions are denominations of a religion, ethnic identity, class, or region for citizens of a state and factions of a political movement.
Where, I'm unsure, but when, I think I know. There is a theory that the first asteroid to hit Earth was actually a comet. It wiped out the dinosaurs.
Prime meridian divides the earth into western and eastern hemispheres
Answer:
Black Sea and Caspian Sea
it seperates those ones
