U.S. Army
Dennis Patrick O'Neill
January 7, 1930—January 22, 2020
MAJ
Life Timeline
90 years1930
Born
January 7, 1930
US ARMY
Service Record
MAJ
2020
Passed Away
January 22, 2020
Service Record
Verified fields from cemetery source data.
Branch
US ARMY
Rank
MAJ
Sourced from official cemetery data; last updated May 30, 2026.Learn more