1917 saw next stages of the Russian Revolution,[12] and re-emergence of the Communist party led by Lenin, who declared "Guns give us the power" and "All power to the Soviets!"[13] After the February Revolution, the Tsar Nicholas II was arrested and the Tsar's government was replaced by two opposing centers of political power: the "pro-democracy" Provisional government and the "pro-communist" Petrograd Soviet.[14] Then the Provisional government was overthrown by the communists in the October Revolution,[15] causing the Russian Civil War.