Whakaotihia te rerenga e whai ake nei: I whakatairangahia a Gangl ki Oberfeldwebel i te marama o Noema 1938. Mai i te Oketopa 1939 i whakaarohia ia ki te ako i te kura rangatira o te Wehrmacht. Heoi, me noho tana pu i Saar-Palatinate i te rohe ki France, hei whakarite mo te pakanga. I reira, i te Mahuru 7, 1939, tekau ma tahi nga wehenga French, 25 km te whanui, ka whiti i te rohe ka neke atu i te 8 km ki te rohe Tiamana. Ahakoa, i hoki atu rātau i roto i ngā wiki e rua i runga i ngā whakahau a Gamelin. Koinei te wā tuatahi o te whawhai a Gangl i te Pakanga Tuarua o te Ao. E ono marama a Gangl i noho ki nga hohipera i nga marama e whai ake nei o te "Whawhai Peke". I hoki ia ki tana reihana i te Mei 14, 1940, ka uru ki te pakanga ki te hauauru. I mahi ia i reira hei rangatira mo te roopu mataaratanga o te 25th Infantry Division o te Wehrmacht. I muri i te
Armistice o Compiègne, he kaiwhakaako ia i roto i te tari whakakapinga puhi 25. Whai muri i tana wa poto i te marama o Akuhata 1940, he kaiwhakaako ia i tetahi turanga i Taus i te Protectorate o Bohemia me Moravia. I timata ia i te whakangungu kotahi marama i te kura pupuhi i Jüterbog i te Noema 25, 1940.