U.S. Army
John J O'Brien
August 5, 1927—April 27, 2001
CPL
Life Timeline
73 years1927
Born
August 5, 1927
US ARMY
Service Record
Korean War
Korean War
Conflict
CPL
2001
Passed Away
April 27, 2001
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
CPL
War / Conflict
Korean War
Sourced from official cemetery data; last updated May 30, 2026.Learn more