1914. But they left in 1917.
Yes, it is true Russia joined WW1 because of a previous agreements to protect Serbia
Lenin
they were hungry
in1952 russia join the olympics
the united states joined in 1917, ww1 started in 1914.!!
no they helped win it
Russia
Nope.
Russia wanted to protect the Slavic peoples of Serbia
August 1916
They did join WW1...
Russia