U.S. Army
John Joseph O'Brien
September 29, 1925—July 18, 2000
SP3
Life Timeline
74 years1925
Born
September 29, 1925
US ARMY
Service Record
Korean War
Korean War
Conflict
SP3
2000
Passed Away
July 18, 2000
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
SP3
War / Conflict
Korean War
Sourced from official cemetery data; last updated May 30, 2026.Learn more