 When the original Captain America, Steve Rogers, and his sidekick, Bucky, went missing in action in 1945, U.S. President Harry S. Truman recruited Naslund and a young man named Fred Davis to become the new Captain America and Bucky.Alongside Namor the Sub-Mariner and the original Red Guardian, the new Captain America stopped a Nazi plot to destroy the Potsdam Conference.They briefly fought alongside the post-war All-Winners Squad, battling Isbisa and, with the Blonde Phantom, fought to prevent a criminal attempt to steal the atomic bomb, encountering a time-traveling She-Hulk during this mission.