Marseille, of French Huguenot ancestry, joined the Luftwaffe in 1938. At the age of 20 he graduated from one of the Luftwaffe's fighter pilot schools just in time to participate in the Battle of Britain, without notable success. A charming person, he had such a busy night life that sometimes he was too tired to be allowed to fly the next morning. As a result of poor discipline, he was transferred to "Jagdgeschwader" 27 (Fighter Wing 27, JG 27), which relocated to North Africa in April 1941.