Early in 1940, he defeated a group of Nazi saboteurs who had taken over the Dean Brothers Circus in Chicago. Later that same year, he foiled a Nazi plot to steal top secret plans from a munitions factory. In May, he lost contact with Sabbath Raven after an argument in a bar in Rotterdam just before the Nazi invasion of the city. After failing to find her, Fortune returned to the U.S. He was rejected as a subject for Project: Rebirth, but helped protect the man who was chosen, Steve Rogers (who would become Captain America) from Nazi agents. In 1942, he met the Sub-Mariner during the Murmansk Run. He returned to the war as a G.I. in 1943. In the final days of the war, Fortune was responsible for killing the leader of the Dark Ocean Society, After the war, he continued his search for Sabbath, but again failed.