Causes of World War I The assassination of Archduke Francis Ferdinand triggered World War I. However, the war had its origins in developments in the 1800's. The chief causes of World War I were the European Alliances, nationalism, imperialism, and militarism. The alliance system was one of the last factors to emerge before the war. Consequentially, the contributions of this system to the beginning of the Great War have to be considered. Although the alliance …showed first 75 words of 693 total…

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