US ARMY, US NAVY
John Oscar Mayo Sr
December 11, 1915—August 30, 1999
M SGT, SPS1
Life Timeline
83 years1915
Born
December 11, 1915
US ARMY, US NAVY
Service Record
World War II
World War II
Conflict
M SGT, SPS1
1999
Passed Away
August 30, 1999
Service Record
Verified fields from cemetery source data.
Branch
US ARMY, US NAVY
Rank
M SGT, SPS1
War / Conflict
World War II
Sourced from official cemetery data; last updated May 30, 2026.Learn more