Rubuta ci gaba don wannan sakin layi - mamayewar Jamus ta Poland a watan Satumbar 1939 ya fara Yaƙin Duniya na II a Turai. Rundunar sojin sama ta Faransa da RAF Bomber Command sun fara kai hare-hare kan tashar jiragen ruwa da jigilar kayayyaki na Jamus. Yaƙin Heligoland Bight a watan Disamba na 1939 ya kawo ƙarshen ayyukan hasken rana na Royal Air Force (RAF) har zuwa 1944. Bomber Command ya ci gaba a cikin ayyukan dare a kan Jamus, wanda ya fadada zuwa garuruwan Jamus da birane daga 10/11 Mayu 1940. Bayar da Faransawa
Bayan yakin Faransa bai kawo karshen barazanar da sojojin sama na Burtaniya ke haifarwa ba. Wolfgang Falck ya umurci I / ZG 1 a lokacin da Jamus ta mamaye Denmark. Nan da nan bayan aikin, Bomber Command ya bayyana sau da yawa don kai farmaki ga matsayi na Jamus, kuma Falck ya iya tashi da tsinkaye a lokacin dusar ƙanƙara. Falck yana da tabbacin cewa rukunin Messerschmitt Bf 110 na iya kare sararin samaniya da daddare tare da taimakon masu aikin radar. An gayyaci Falck zuwa RLM don bayyana ra'ayinsa ga Albert Kesselring, Ernst Udet da Erhard Milch. Hermann Göring, babban kwamandan Luftwaffe, ya umarci Falck da ya kirkiri "Nachtjagdgeschwader" a Düsseldorf a ranar 22 ga Yuni, 1940.