When Did We Start Calling It World War I?

When World War I broke out in 1914, nobody called it that. The U.S. said “European war,” France called it “The Great War”—but Germany? They used Weltkrieg from day one.
It wasn’t officially named “World War I” until 1919. And World War II? That title came in 1945.
Here’s the twist: there’s no legal definition of a world war. No checklist. Just chaos.

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