 In addition to iron ore, Germany required SKF Swedish ball bearings.Already during the Norwegian campaign the Swedish Government gave the Wehrmacht access to the Swedish rail system, allowing the Germans to transfer 60 soldiers under the guise of red-cross personnel from the occupied areas in Southern Norway to the fighting at the Narvik front.Access to the Swedish railways was later granted on condition that the number of German soldiers travelling to occupied Norway would balance the number leaving (in practice this limitation would be ignored).