er üb ung , ▁the ▁invasion ▁of ▁Norway . ▁The ▁German ▁plan ▁for ▁the ▁attack ▁called ▁for ▁an ▁am ph ib ious ▁assault ▁on ▁the ▁Norwegian ▁capital , ▁Os lo , ▁and ▁six ▁major ▁ports ▁from ▁Krist ians and ▁in ▁the ▁south ▁to ▁Nar vik ▁in ▁the ▁north . ▁Sim ult ane ously , ▁J unk ers ▁ 5 2 ▁( J u   5 2 ) ▁transport ▁aircraft ▁would ▁drop ▁par ach ute ▁troops ▁to ▁secure ▁Os lo ' s ▁For ne bu ▁air port . ▁Add itional ▁Ju   5 2 s ▁were ▁scheduled ▁to ▁arrive ▁at ▁For ne bu ▁twenty ▁minutes ▁after ▁the ▁par ach ute ▁drop , ▁by ▁which ▁time ▁the ▁air field ▁had ▁to ▁be ▁in ▁German ▁hands . ▁ 1 ./ Z G   7 6 ▁was ▁to ▁provide ▁air ▁cover ▁and ▁ground - att ack ▁support ▁for ▁both ▁waves . ▁E ight ▁B f   1 1 0 ▁Z erst ör er ▁of ▁ 1 ./ Z G   7 6 ▁took ▁off ▁at ▁ 7 : 0 0 ▁in ▁the ▁morning , ▁planning ▁to ▁synchron ise ▁their ▁arrival ▁at ▁For ne bu ▁with ▁the ▁par ach ute ▁drop ▁at ▁ 8 : 4 5 . ▁The ▁distance ▁from ▁West er land ▁to ▁For ne bu ▁meant ▁that ▁this ▁was ▁a ▁one - way ▁operation ; ▁the ▁B f   1 1 0 s ▁could ▁not ▁hold ▁enough ▁fuel ▁for ▁the ▁return ▁trip . ▁Their ▁fuel ▁was ▁calculated ▁to ▁provide ▁them ▁ 2 0 ▁minutes ▁flying