Sergeant Duffy

Sergeant Duffy was the bumbling, hot-tempered Army drill sergeant stationed at Camp Lehigh who constantly clashed with his seemingly clumsy recruit Steve Rogers, unaware that the scrawny soldier was secretly Captain America.

Few characters can claim a debut as historic as Sergeant Duffy's — he first appeared in Captain America Comics #1 in 1941, the legendary Golden Age issue conjured by none other than Joe Simon and Jack Kirby that launched one of Marvel's most enduring icons. A supporting fixture in the world of Captain America, Duffy has shared the page with Steve Rogers, Bucky Barnes, and the Star-Spangled Avenger himself across titles spanning from wartime classics to modern runs like Captain America: Sentinel of Liberty — a remarkable 83-year presence in the Marvel universe. With 34 catalog appearances and two collector-recognized key issues to his name, this is a character whose longevity speaks for itself: Sergeant Duffy is woven into the very fabric of Captain America's history, a reminder that even in a world of super-soldiers and legends, the supporting cast can leave a lasting mark.