(i). Red Army : Bolshevik party organised a strong army to face foreign armies and chieftains of Czar Nicholas-II which was known as Red Army. Later on this army became stronger under the leadership of Trotosky and played an important role to defeat White army and to force changes in the policies of allied powers.
(ii). White Army : The army against the Bolsheviks in Russia was known as White Army. These white armies were organised to remove the Bolshevik government by the chieftains of Czar Nicholas-II with the cooperation of Allied powers.
(iii). Cheka : In Russia-Bolsheviks established a secret court to suppress the revolutionaries, which was known as Cheka. Feliks Kerensky was the president of this court. In his leadership thousands of revolutionaries were killed. Cheka destroyed their opponents completely with terror and merciless acts.