Rubuta ci gaba ga wannan sakin layi - Bayan mamayewar Norway da harin Jamus a kan Narvik
a ranar 9 ga Afrilu, 1940, ta sojojin 3rd Mountain Division karkashin jagorancin "Generaloberst" Eduard Dietl, Løken yana da alhakin aiwatar da aikin Norwa a Troms. Aikin farko da Løken ya yi, ban da tattarawa, shine amfani da sojojin da yake da su da farko don toshe sojojin Jamus a Narvik daga ci gaba zuwa Troms. Kula da iko da sansanin soja na tsakiya Setermoen yana da muhimmanci ga aikin Norwegian. Sojojin da ke karkashin umarnin Løken kai tsaye lokacin da Jamusawa suka mamaye sun kasance rundunar bindiga, rundunar bindigogi na dutse da kuma dakarun tallafi. A yammacin ranar 8 ga Afrilu, an umurci Kanar Løken da ya aika da rundunar sojojinsa da kuma batirin bindigogi zuwa Narvik don kare garin, amma canja wurin dakarun da aka yi a gaban Jamus. A cikin kiyaye matsayin kariya tare da kusan dukkanin sojojinsa yayin matakin tattarawa, Løken ya sami sabani tare da babban jagorancin Rukunin na 6, wanda ke son saurin kai hari kan Jamusawa da wuri-wuri. Duk da cewa ba a kai hari ba nan da nan, Løken ya tura dakarun zuwa gaba don toshe wuraren da ke kudu fiye da yadda aka tsara, kamar yadda ya ga yana da muhimmanci a dakatar da ci gaban Jamus a yankin Gratangen. Matsayin kula da Colonel Løken game da yaƙi ya haifar da lalacewar dangantakarsa da kwamandan rundunar da ya fi dacewa, Carl Gustav Fleischer. A ranar 19 ga Afrilu, Løken ya ba da rahoton cewa halin kirki na sojojin Jamus da ke adawa da juna ya yi rauni, kuma yawancin 'yan Jamus sun kasance "ƙasa da matsakaici" a wasan tsere.