What was the name of the split between Eastern Europe and Western Europe?

Answer:schism

Explanation:The schism is the break of communion and theology between what are now the Eastern (Orthodox) and Western (Roman Catholic from the 11th century, as well as from the 16th century also Protestant) churches.

The Iron Curtain. The term is fathered by Winston Churchill, the former British prime minister. He used it to refer to the divide of Europe into two camps in the Cold War era, with capitalistic and democratic Western Europe on one side, and communist Eastern European countries on the other side. He said that an iron curtaian had descended upon the peoples of the eastern part of the continent separating them from the rest.