<prompt> Bhala okuqhubekayo kwalesi sigaba - Izenzakalo zika-April kuya ku-June 1940 zashintsha ukulinganisela kwamandla asolwandle nawomoya, njengoba amaJalimane anqoba iDenmark  <response>: , eNorway, eNetherlands, eBelgium naseFrance. Ukuhlala kwala mazwe kwavumela i-Luftwaffe ne-Kriegsmarine ukuba isebenze emathekwini aseFrance ogwini lwase-Atlantic, amakhilomitha angamakhulu eduze kwemizila yemikhumbi yase-Atlantic. Izindiza zamabhomu eziphakathi zaseJalimane zazikwazi nokufinyelela emachwebeni aseBrithani asogwini olusentshonalanga nolusenyakatho. Inzuzo eyayitholwa amaJalimane, yabenza bakwazi ukuvimbela imikhumbi yabathengisi eyayithumela ukudla nezinto zempi eBrithani ngokuphumelelayo, okwakungabangela ukuba iBrithani ibulawe yindlala. Ngesikhathi imikhumbi yezohwebo ihlupheka ngalezi zilahleko, i-Coastal Command yayibonise ukuthi ayisebenzi ekulweni nokuhlaselwa kwemikhumbi yaseJalimane emoyeni nasolwandle. Kodwa umyalo awukwazanga ukuvikela imikhumbi ye-English Channel, futhi waphoqeleka ukuba ayeke ukusebenza kuze kube nguJulayi 1940. I-RAF Fighter Command yanikezwa umsebenzi, ukuhlinzeka ukuhlaselwa emoyeni nokuvikela isitha. Izimpawu eziyisixwayiso ngemva kweMpi Yezwe Yokuqala, zokuthi ama-U-boat ayengase abe usongo olukhulu futhi, zisho ukuthi izindiza zaziyoba yindlela engcono kakhulu yokulwa nemisebenzi yawo. Leli qiniso lingaqondwa ngokugcwele, i-Coastal Command yaba yi-Cinderella service kwaze kwaba cishe ngo-1943. 