US MARINE CORPS
Leo Francis O'Neil Jr
July 1, 1949—March 23, 2007
SGT
Life Timeline
57 years1949
Born
July 1, 1949
US MARINE CORPS
Service Record
Vietnam War
Vietnam War
Conflict
SGT
2007
Passed Away
March 23, 2007
Service Record
Verified fields from cemetery source data.
Branch
US MARINE CORPS
Rank
SGT
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more