According to some historians which marks the beginning of the US civil war

Battle of Fort Sumter

Explanation:

The Battle of Fort Sumpter marked the beginning of the Civil War.

the church governed the society after the empire fell.   constantine took charge of rome and ended the confusion which had over religion and made christianity as the only religion and that started ruling the roman empire. he also divided the empire into two and fortified the eastern part.   he ruled the eastern part.