Kammala wannan jumla: The Condor Legion ya goyi bayan Nationalists a cikin
Yaƙin Bilbao kuma ya taka muhimmiyar rawa wajen kayar da farmakin Jamhuriyar Republican a Yaƙin Brunete, kusa da Madrid. Ta hanyar kai hari kan filayen jirgin sama, ta amfani da bataliya ta flak a layin gaba, da kuma yin amfani da mayaƙan Bf 109 guda 20 a matsayin jagorar mayaƙan jirgin sama, 'yan Nationalist sun sami rinjaye a sama sama da Sojojin Sama na Jamhuriyar 400. 'Yan kishin kasa sun lalata jiragen sama 160 don asarar 23. Mutanen Sperrle sun jagoranci rundunonin soja guda takwas da kuma manyan tankuna a cikin goyon bayan iska da kuma rawar da suka taka. Daga wannan lokacin, Legion ya mallaki babban iko na iska da kuma sassauci don canja wuri da sauri zuwa wasu bangarori don tallafawa yakin basasa.