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World War I began on July 28, 1914, and lasted until November 11, 1918. It was triggered by a combination of events and political tensions among the major powers in Europe, which had been escalating significantly over the years leading up to the war. The key factors that led to the outbreak of the war include: 1. **Military Alliances**: Before the war, European countries had formed complex defensive alliances. The most prominent were the Triple Alliance between Germany, Austria-Hungary, and Italy, and the Triple Entente between France, Russia, and Britain. These alliances meant that a small regional conflict could quickly escalate into a larger war involving many nations. 2. **Nationalist Tensions**: There were strong nationalist movements in Europe, especially in the Balkans. The Austro-Hungarian Empire, for example, faced internal challenges due to its diverse ethnic composition, which heightened tensions. 3. **Arms Race**: The period leading up to World War I saw a significant arms rac
