US NAVY
John W Koper
April 8, 1919—June 23, 2015
MM1
Life Timeline
96 years1919
Born
April 8, 1919
US NAVY
Service Record
World War II
World War II
Conflict
MM1
2015
Passed Away
June 23, 2015
Service Record
Verified fields from cemetery source data.
Branch
US NAVY
Rank
MM1
War / Conflict
World War II
Sourced from official cemetery data; last updated May 30, 2026.Learn more