The Russian Revolution had two phases. In the first phase, called the February Revolution, because get this, it occurred in February, army mutinies and civil unrest forced the overthrow of the Romanov dynasty, which had been in power in Russia since, like, forever, to use a proper historian term. The monarchy was replaced by a provisional government, led eventually by Alexander Kerensky, who made the terrible decision to keep Russia in the war, which led to the October Revolution, so-called because it happened in October, in which Vladimir Lenin and his Bolsheviks took over, famously promising the Russian people peace, bread, and land, to which the Russian people responded, hey, you just named three of our favorite things. Lenin's first big achievement was signing a separate peace with Germany and getting Russia out of the war, which was helpful to him since he needed to fight a civil war that wouldn't end until 1922. This might have helped Germany, too, except the US entered the war on the side of the British and the French, which led to another outcome of the war, increased geopolitical influence for the US. The US was already becoming a major economic power, and being able to avoid the destruction and loss of manpower associated with World War I certainly didn't hurt. The war helped catapult the US from being a debtor nation to a creditor one, and Wilson's leading role in negotiations at Versailles, even though he didn't actually get what he wanted, made America a big player on the world stage for the first time.