U.S. Army
John Mark Hardenbrook
March 11, 1951—May 27, 2005
Life Timeline
54 years1951
Born
March 11, 1951
US ARMY
Service Record
Vietnam War
Vietnam War
Conflict
2005
Passed Away
May 27, 2005
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more