There are many reasons why World War I broke out in 1914, some of which were obvious and some of which were less obvious. The most important reasons for the outbreak of the First World War would be the alliances in Europe, imperialism, militarism and nationalism. Finally, the most obvious reason, the assassination of Archduke Francis Ferdinand, was the cause of the immediate outbreak of the First World War. Over time, many countries in Europe had made agreements to defend each other in case their country disappeared. in the battle. Most of the largest European countries participated in these agreements. Some of the most important were Russia and Serbia, Germany and Austria-Hungary, and France and Russia. Without these alliances, World War I may never have happened. Before the Great War, many countries in Europe were looking for ways to increase their wealth and power. These were the main causes of imperialism among the countries of Europe. Because countries were trying to be more powerful and richer, this led to competition and the desire to become richer....