Which of the following explains why some people use 1918 as the starting date of the Russian civil war

Answer 1

Some people use 1918 as the starting date of the Russian civil war because that was the year when the Bolsheviks, led by Vladimir Lenin, officially took power in Russia after the October Revolution. This marked the beginning of the conflict between the Bolsheviks and their opponents, including the White Army, leading to a full-fledged civil war.