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Appears in Call of Duty 2: Big Red One
Rank Sergeant
Affiliations American Dog Company
Status Alive
Weapon M1 Thompson

Sergeant Hassler was an American combat engineer from Dog Company, seen in Call of Duty 2: Big Red One.

Hassler led Privates Wheeler and Hurst, two other combat engineers, on a mission with Sgt. Hawkins's squad to flank the German position and disarm their minefield emplacements. They did so successfully, and Hassler is never seen or heard from again.