US MARINE CORPS
John K O'Neil
July 1, 1947—February 28, 2001
PFC
Life Timeline
53 years1947
Born
July 1, 1947
US MARINE CORPS
Service Record
Vietnam War
Vietnam War
Conflict
PFC
2001
Passed Away
February 28, 2001
Service Record
Verified fields from cemetery source data.
Branch
US MARINE CORPS
Rank
PFC
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more