In 1931 Mangin, partnering with compatriot Berkeley Bell, were runners-up in the doubles final of the U.S. National Championships, played in Brookline, MA, losing in straight sets to compatriots John Van Ryn and Wilmer Allison.
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Reaching the rank of staff sargeant he received the Distinguished Flying Cross (DFC), the Air Medal with six clusters and a Purple Heart with one cluster.
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He was wounded twice in missions over Italy and France and shot down two ME-109s in a mission over Germany.
Gregory Peck | Gregory of Tours | Order of St. Gregory the Great | Gregory Bateson | Pope Gregory VII | Gregory of Nyssa | Pope Gregory XIII | Pope Gregory XVI | Lady Gregory | Gregory S. Paul | Gregory Corso | Pope Gregory XV | Gregory of Nazianzus | Pope Gregory XI | Philippa Gregory | Gregory the Illuminator | Gregory Olsen | Gregory Blaxland | Dick Gregory | Pope Gregory I | Gregory Reinhart | Gregory Deyermenjian | Gregory Crewdson | Gregory Benford | Francis Thomas Gregory | Andre Gregory | Pope Gregory X | Pope Gregory VI | Jack Gregory | Gregory Thaumaturgus |
Together with Gregory Mangin he won the doubles title National Indoors Tennis Championships, played at the Seventh Regiment Armory in New York.