US MARINE CORPS
Mark Edward De John
September 10, 1947—July 14, 1999
Life Timeline
51 years1947
Born
September 10, 1947
US MARINE CORPS
Service Record
Vietnam War
Vietnam War
Conflict
1999
Passed Away
July 14, 1999
Service Record
Verified fields from cemetery source data.
Branch
US MARINE CORPS
War / Conflict
Vietnam War
Sourced from official cemetery data; last updated May 30, 2026.Learn more