U.S. Army
Leonard J Mattern Jr
October 12, 1924—September 25, 2007
TEC 5
Life Timeline
82 years1924
Born
October 12, 1924
US ARMY
Service Record
World War II
World War II
Conflict
TEC 5
2007
Passed Away
September 25, 2007
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
TEC 5
War / Conflict
World War II
Sourced from official cemetery data; last updated May 30, 2026.Learn more