US NAVY, US NAVY
John Michael Koval Sr
June 28, 1922—February 21, 2013
Y1C, YNT1
Life Timeline
90 years1922
Born
June 28, 1922
US NAVY, US NAVY
Service Record
World War II
World War II
Conflict
Y1C, YNT1
2013
Passed Away
February 21, 2013
Service Record
Verified fields from cemetery source data.
Branch
US NAVY, US NAVY
Rank
Y1C, YNT1
War / Conflict
World War II
Sourced from official cemetery data; last updated May 30, 2026.Learn more