Introduction World War I was the result of leaders' aggression towards other countries which was supported by the rising nationalism of the European nations. Economic and imperial competition and fear of war prompted military alliances and an arms race, which further escalated the tension contributing to the outbreak of war. Nationalism At the settlement of the Congress of Vienna in 1815, the principle of nationalism was ignored in favor of preserving the peace. Germany and Italy …showed first 75 words of 1245 total…

…showed last 75 words of 1245 total…war on July 31 if the Russians did not demobilize. Upon being asked by Germany what it would do in the event of a Russo-German War, France responded that it would act in its own interests and mobilized. On August 1, Germany declared war on Russia, and two days later, on France. The German invasion of Belgium to attack France, which violated Belgium's official neutrality, prompted Britain to declare war on Germany. World War I had begun.