How did World War I affect Russia and its government?
World War One led to the destruction of the Russian Monarchist Government, a chaotic Civil war and the establishment of an experimental Ideological Society.
Russia entered WW1 to defend Serbia to which it had deep cultural ties. Its first enemy was the Austro-Hungarian Empire and its desire to control the Balkans. WW1 became a monster that no government could control that endlessly devoured men and resources.
In 1917 the Russian Government in the form of the Tsar had a crisis of confidence on a train to St. Petersberg. He abdicated, no one of the ruling class would replace him. Chaos ensued as new governments tried to establish a new order. Civil War followed as the final experimental government fought to established itself. Russia made peace and exited WW1.