Consequently, Austria’s declaration of war on Serbia set off a chain reaction that drew many European nations into war. Russia mobilized along Germany’s border just as a precaution, but to Germany the mobilization amounted to a declaration of war. So on August 1, 1914 Germany declared war on Russia, and three days later, Germany declared war on Russia’s ally France. Because of the event of a 2-front war, Germany used the Schlieffen Plan, in which Germany would attack France first, then attack Russia. Then Germany attacked Belgium, a neutral country, which then caused Britain to declare war on Germany on August 4. There were 2 sides fighting this war now, the Central Powers and the Allies. On September 5, the first battle had started on the Marne River. By September 13, the Germans had been driven back, and the allies had won the first major clash of the Western Front. This victory was very important because it left the Schlieffen Plan in ruins. A new type of warfare was developed during this war, and it was called trench warfare. Also many new tools were developed, machine guns, poison gas, armored tanks, larger artillery, airplanes, and submarines. By now the Central Powers had gained upper hand, and Russia’s war effort weakens due to the fact that Russia was not industrialized. However, thanks to its tremendous population, Russia was able to hold its ground against Germany. Soon the war had spread to Africa, and many parts of southwest and southeast Asia. Now the massive European conflict has indeed become a world war.

Soon Russia was in chaos and civil unrest, so in March 1918, Russia and Germany signed the Treaty of Brest-Litovsk, which ended the war between them. In March 1918, the Germans mounted one final massive attack, they crushed e

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