Jan Eugeniusz Ludwig Zumbach was a Polish-Swiss fighter pilot who became an ace and squadron commander during the Second World War. During the Battle of Britain, Zumbach scored eight victories and one probable, mostly against Messerschmitt Bf 109 fighters. Zumbach was shot down by a JG 3 Bf 109 over Dover on 9 May 1941 when returning from a mission, but he was again able to bail out unharmed. Zumbach became one of the first Allied pilots to engage in combat with a German Focke-Wulf Fw 190, which he damaged; in return, his aircraft was damaged by a "single radial-engined fighter" on 13 October 1941. In December 1941, Zumbach was posted to 58 OTU, and in March 1942 returned to 303 Squadron as a flight commander. In May, he was promoted to squadron leader and took command of the squadron, a post Zumbach held from 19 May 1942 until 30 November 1943.