US MARINE CORPS
Donald E O'Brien
August 12, 1943—July 4, 2021
SSGT
Life Timeline
77 years1943
Born
August 12, 1943
US MARINE CORPS
Service Record
Vietnam War
Vietnam War
Conflict
SSGT
2021
Passed Away
July 4, 2021
Service Record
Verified fields from cemetery source data.
Branch
US MARINE CORPS
Rank
SSGT
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more