There’s an error in the story. It was not “G.I. Combat” which changed its title to “Sgt. Rock” in 1977, but rather, “Our Army at War.”
Thanks, I hadn’t noticed that. Sgt. Rock and Easy Company were the main characters in “Our Army at War”, while Sgt. (later Lt.) Jeb Stewart and the Haunted Tank were in “G.I. Combat”, although there were a number of crossovers over the years in which Easy Company served with the Haunted Tank.