US NAVY
John Warren Mercer
September 11, 1936—April 22, 2016
CPO
Life Timeline
79 years1936
Born
September 11, 1936
US NAVY
Service Record
Korean War
Korean War
Conflict
CPO
2016
Passed Away
April 22, 2016
Service Record
Verified fields from cemetery source data.
Branch
US NAVY
Rank
CPO
War / Conflict
Korean War
Sourced from official cemetery data; last updated May 30, 2026.Learn more