U.S. Army
Joseph R O'Brien
November 9, 1919—April 6, 1993
1ST SG
Life Timeline
73 years1919
Born
November 9, 1919
US ARMY
Service Record
World War II
World War II
Conflict
1ST SG
1993
Passed Away
April 6, 1993
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
1ST SG
War / Conflict
World War II
Sourced from official cemetery data; last updated May 30, 2026.Learn more