The First World War, which began in 1914, was caused by a complex interplay of long-term factors and a specific triggering event. Here are the main causes: 1. Militarism: European powers engaged in an arms race, building up large armies and navies. This created an atmosphere of suspicion and made war seem like a viable option for resolving disputes. 2. Alliances: A system of complex and interlocking alliances divided Europe into two main camps: the Triple Entente (France, Russia, Britain) and the Triple Alliance (Germany, Austria-Hungary, Italy). These alliances meant that a conflict between two nations could quickly escalate into a continent-wide war. 3. Imperialism: European nations competed fiercely for colonies and resources around the world. This competition led to rivalries and tensions, particularly between Britain, France, and Germany. 4. Nationalism: Intense national pride and the desire for self-determination fueled tensions. This was particularly evident in the Balkans, where various ethnic groups sought independence from empires like Austria-Hungary and the Ottoman Empire. 5. Assassination of Archduke Franz Ferdinand: The immediate trigger for the war was the assassination of Archduke Franz Ferdinand of Austria-Hungary by a Serbian nationalist in Sarajevo on June 28, 1914. This event set off a chain reaction due to the existing alliance system. 3 done, 2 left today. You're making progress. Send the next one 📸