U.S. Army
Robert D O'Brien
February 24, 1936—October 21, 2003
CSM
Life Timeline
67 years1936
Born
February 24, 1936
US ARMY
Service Record
Vietnam War
Vietnam War
Conflict
CSM
2003
Passed Away
October 21, 2003
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
CSM
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more