US NAVY
John William Mercado
March 22, 1928—January 23, 2019
PNA3
Life Timeline
90 years1928
Born
March 22, 1928
US NAVY
Service Record
Korean War
Korean War
Conflict
PNA3
2019
Passed Away
January 23, 2019
Service Record
Verified fields from cemetery source data.
Branch
US NAVY
Rank
PNA3
War / Conflict
Korean War
Sourced from official cemetery data; last updated May 30, 2026.Learn more