GI [ dʒi aɪ ː ] is a term for an infantryman of the armed forces of the United States.
This term originated in the period 1915-1920. The original of the abbreviation is probably at the time used by the U.S. Army metal dustbins, was stamped on the GI Galvanized Iron for. Later, it was thought that the abbreviation for Government Issue ( " (her ) issued by the government " ) is, and transferred them to the soldiers.
Other meanings that have been attributed to the shortcut later, General Infantry, Ground Infantry, General invasion and Government Inductee.
Since the Mexican-American War, and especially during the First World War, the American infantrymen were called Doughboys.