Russia in WWI really pushed WWI further to a more intense battle. As Archduke Ferdinand was assassinated by a Serb student, Russia supported the Serbs (possibly) and in turn, other powers like Austria and Germany entered and supported the opposite side of the confrontation. Which lead to more countries getting involved. Russia was not the country that started WWI but it was a major factor in the war's advancement as a true World War.
Russia
Nicolas was the acting ruler of Russia (czar) during World War 1, however during World War 1, The Soviet Revolution happened and the czar was overthrown and Russia soon pulled out of the war and became neutral. The Soviet Union would form out of it, lasting from 1922-1991.
Joseph Stalin was Russia's ruler during World War II.
Russia won the battle over Germany and was a huge blow to Germany. This also was a major turning point during WW2.
MY TEACHER TOLD ME THAT DURING WW1 RUSSIA WAS STARVING THEY WERE LOSING MONEY ALSO WENT INTO A BIG DEPRESSION WICH MADE THEM DROP OUT THE WAR