Russia.
Its Russia
Russia dropped out of WW1 in 1917 due to internal Revolution (the Bolshevik revolution to be exact.)
Russia.....stupid.
Russia.
Russia
USSR
World War I
The country that left the triple allience when World War 1 started was Italy.
the USA Joined the war in 1917
in 1917 russia withdrew from the war specifically December 1917
russia because of the bolsheviek revolution in 1917. Technically, it was the Russian Revolution in 1917, which led to the Russian Civil War, which was won by the Bolsheviks.