 Complete the following phrase:  Created in 1939 based on the Zerstörer concept advocated by Hermann Göring, commander-in-chief of the Luftwaffe, the wing was only partially equipped with the Bf 110. Some units were designated Jagdgruppe 76 and flew the Messerschmitt Bf 109 during the Phoney War. Those elements gruppen, or groups that operated the Bf 110 fought in the Invasion of Poland in September 1939 which began World War II. Thereafter, ZG 76 fought in the 