US MARINE CORPS
John William O'Neil
June 25, 1943—August 21, 2014
PVT
Life Timeline
71 years1943
Born
June 25, 1943
US MARINE CORPS
Service Record
Vietnam War
Vietnam War
Conflict
PVT
2014
Passed Away
August 21, 2014
Service Record
Verified fields from cemetery source data.
Branch
US MARINE CORPS
Rank
PVT
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more