Why did russia leave the war in 1917?

Answer 1

while the usa entered the war o the western front, Russia was being defeated in the east. the war had been going badly for the Russians for sometime. revolution in russia in 1917 led to a collapse of the Russian war effort and withdrawal from the war. faced with total defeat, the new communist rulers of russia agreed to all the German demands and signed the treaty of brest-litovsk in march 1918. under this peace treaty Germany dealt very harshly with russia, taking control of huge areas of Russian territory.

Answer 2

Because Vladimir Lenin wasnt to concentrate and establish a communist state. Which led to the Treaty of Brest-Litovsk.