Tuhia he tohutoro mō tēnei wāhanga - I tīmata te Pakanga Tuarua o te Ao i Uropi i te Paraire 1 Mahuru 1939 i te wā i whakaekehia ai e ngā ope Tiamana a Pori. I taua wā, III. Ko te "Gruppe" i raro i te whakahau a "Hauptmann" (Captain) Werner Mölders, a, i hangaia i Wiesbaden-Erbenheim i te 26 o Mahuru 1939. Ko te rangatira rangatira o Müller me te 8. Ko te "Staffel" ko "Oberleutnant" (Tumuaki Tuatahi) ko Hans von Hahn. I rere a Müller i nga misioni whawhai i te wa o te Pakanga Phoney a i whakawhiwhia ki a ia te Iron Cross 2nd Class () i te 17 o Aperira 1940. I kii ia i tana wikitoria rererangi tuatahi i te Pakanga o France. I te 27 o Mei 1940, i te wa o te tangohanga o Dunkirk, i koperea e ia he Armée de l'Air Curtiss Hawk i te taha o Amiens. I te 10 o Pipiri, i whakawhiwhia ki a ia te whakangaromanga o nga rererangi whawhai Morane-Saulnier M.S.406 e toru. Ko te "Geschwader" i rere i ana misioni whawhai whakamutunga i te Whakatairanga French i te 19 o Pipiri. I te 20 o Hune, III. I whakaratohia e "Gruppe" nga kaiwhaiwhai i te takiwa o Compiègne i te wa o nga korerorero armistice
i hainatia i te 22 o Hune.