U.S. Army
John L Mattos
June 18, 1942—March 1, 2000
SGT
Life Timeline
57 years1942
Born
June 18, 1942
US ARMY
Service Record
Vietnam War
Vietnam War
Conflict
SGT
2000
Passed Away
March 1, 2000
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
SGT
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more