US MARINE CORPS
John H O'Brien
November 15, 1927—October 12, 2014
SSGT
Life Timeline
86 years1927
Born
November 15, 1927
US MARINE CORPS
Service Record
Korean War
Korean War
Conflict
SSGT
2014
Passed Away
October 12, 2014
Service Record
Verified fields from cemetery source data.
Branch
US MARINE CORPS
Rank
SSGT
War / Conflict
Korean War
Sourced from official cemetery data; last updated May 30, 2026.Learn more