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Appears in Call of Duty: World at War
Rank Corporal
Affiliations Carlson's Raiders
Birth Before 1922
Death Makin Atoll, August 17, 1942
Weapon M1 Garand
For the playable character in Call of Duty: Modern Warfare: Mobilized, see Patrick O' Neil.

Corporal O'Neill is one of the Marines who rescues the player during "Semper Fi". He is also one of the names that players 2 - 4 can be during Co-op play. He can be killed at "Semper Fi" during single player at anytime during the mission.