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used in U.S. Army paperwork for items made of galvanized iron. The earliest known instance in writing is from either 1906 or 1907. During World War I, U.S. soldiers took to referring to heavy German artillery shells as "G.I. cans". During the same war, "G.I.", reinterpreted as "government issue" or "general issue", began being used to refer to any item associated with the U.S. Army, e.g.,

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