Primarily because of internal chaos and the Tsar losing authority. Communist agitation made it impossible to continue the war which was already impossible to win.
get out of WWI/the great war
Russia.
In 1917, the revolution transferred their support of Alexander Kerensky to Valdimir Lenin. The Russian people despised the war that the tsar had gotten them into because it created starvation and misery. Thus, Lenin promised to the end the war with Germany, so when he came into power, the first thing he did was sign an armistice that released thousands of Germany troops from Russia.
Peace Insurance - 1917 was released on: USA: 31 March 1917
Peace and Quiet - 1917 was released on: USA: 30 December 1917
wanted to retain power and avoid German occupation
Germany declared war with Russia on 1 August 1914. Following the Russian revolutions in 1917 the Bolsheviks began peace negotiations in December 1917 resulting in the Brest-Litovsk treaty of 3 March 1918.
Russia
Blood-Stained Russia - 1917 was released on: USA: 9 December 1917
Russia. In 1917, Russia exited the war.
The Russian Revolution happened in 1917. The new Communist government had promised peace, and therefore signed a separate peace treaty with Germany before the war ended.
When War Means Peace - 1917 was released on: USA: 9 December 1917