Editing The World Wars (section)

====Eastern Europe====
Eastern Europe receives comparatively little study compared to the Western Front, mainly because records from that time weren't well preserved or were destroyed during the chaos of the Russian Revolution. While just as bloody in some instances, it offered many more opportunities for maneuver warfare than was afforded on the Western Front. An attack by the Russians on East Prussia went terribly, but just as France hoped, it forced the Germans to divert men away from France and the Schlieffen Plan and into the Eastern Front. This slow advance by the Central Powers in the east would only be halted and reversed in 1916 by the Brusilov Offensive, a brutal assault wherein the Russians shoved the Austro-Hungarians back into their homeland. 

This was too much at too high a cost, because mass desertions, poor battlefield performance, inadequate food supply and widespread dissatisfaction with the ruling aristocracy along with everything else wrong with the Russian empire saw the country basically collapse. Tsar Nicholas was forced to abdicate, after which he and his family were eventually murdered by the Bolsheviks, and a provisional government was set up. This government proceeded to try an attack against Austria-Hungary with horrific results, stoking further unrest. This was eventually followed by the November 1917 Russian Revolution that brought in Trotsky, Lenin, and the Bolsheviks, who would later become the Communist Party of the Soviet Union. The peace agreement between Germany and Russia saw the latter have a ton of territory taken from them in March, which eventually led to the formation of the Baltic nations, Poland, and Ukraine, among others. Finland also broke away during the chaos of the revolution, and with much bigger problems on their plate, the Russians kinda just let it happen. 

Meanwhile, Serbia would hold out until 1915 against Austria-Hungary, until being overrun after Bulgaria declared for the Central Powers and helped chase the Serbs into Greece. Montenegro followed a few months later in 1916. Greece eventually forced their king to abdicate and declared for the Entente in 1917. The Bulgarians were forced into an armistice after the defeat at Dobro-Pole.  

Romania joined the war after seeing the debacle of the Brusilov Offensive, thinking they could join in on the tail-end and steal some land from a couple of dying empires. They were promptly disabused of this notion after they got their shit kicked in by Bulgaria, Germany, and Austria-Hungary, and their army took up a supporting role alongside the Russians until the Bolshevik revolution forced them to sign an armistice. In the end they still managed to increase their territories as a result of their participation in the conflict, so they got what they'd wanted even if it hadn't gone exactly as planned.