Sgt. John Jackson was a member of the Iowa National Guard in 1912. He had the fourth best score (of six) among the U.S. military rifle team members, but improved to take a bronze medal in the 600 meter prone event.
|Games||Discipline (Sport) / Event||NOC / Team||Pos||Medal||As|
|1912 Summer Olympics||Shooting||USA||John Jackson|
|Military Rifle, Three Positions, 300 metres, Men (Olympic)||33|
|Military Rifle, Any Position, 600 metres, Men (Olympic)||3||Bronze|
|Military Rifle, 200, 400, 500 and 600 metres, Team, Men (Olympic)||United States||1||Gold|