GI Joe on the battlefield.
GI Joe is a slang name for someone who was or is in the military.
An example of GI Joe is what you might call your cousin who is in the Army.
Slang any man in the U.S. armed forces; esp., an enlisted soldier in WWII
Origin of GI JoeG.I., origin, originally abbreviation, abbreviated from g(alvanized) i(ron), interpreted as g(overnment) i(ssue) + Joe