U.S. Army
John Denis Heffernan
March 31, 1932—November 12, 2017
1ST LT
Life Timeline
85 years1932
Born
March 31, 1932
US ARMY
Service Record
Korean War
Korean War
Conflict
1ST LT
2017
Passed Away
November 12, 2017
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
1ST LT
War / Conflict
Korean War
Sourced from official cemetery data; last updated May 30, 2026.Learn more