Final answer:
During World War I, people in the United States used names like the Great War, the war to end all wars, and the European War to refer to the conflict.
Step-by-step explanation:
During World War I, people in the United States had various names for the war. Some of the names they used included the Great War, the war to end all wars, and the European War. These names were used because the war was a global conflict involving many countries, and it was seen as a war that would bring an end to all future wars.
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