How did WWI go from a war between two nations to a World War?

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20 August, 12:57

How did WWI go from a war between two nations to a World War?

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Cynthia · Answer 1

World War I developed into a global war for a number of reasons. First, the system of alliances quickly brought other nations into the war. This quickly led to a war between the two alliance systems. But Italy switched sides and entered the war on the side of the Triple Entente in 1915.