Kammala jumla mai zuwa: Bayan ya yi aiki a rundunar sojojin Norway kafin ya yi hijira zuwa Birtaniya, Krefting ya koma aiki bayan da Jamus ta mamaye Norway a watan Afrilun 1940. Krefting ya halarci yakin Norway a matsayin jami'in sadarwa, wanda aka ba shi Brigade na 148 na Birtaniya lokacin da aka tura shi don yaƙi da sojojin Jamus da suka sauka a Norway. A lokacin yakin, Krefting yana da matsayi na kyaftin. Bayan bin Brigade na 148 na Sojoji a kan turawa zuwa yankin Moelv a Gabashin Norway, Babban Kwamandan Norway ya umarci Krefting ya koma Birtaniya don shiga Ofishin Jakadancin Norway a can. Ofishin Jakadancin Norway yana da aikinsa na tattara 'yan Norway a Burtaniya don yin aiki tare da sojojin Norway
Yaƙi a Arewacin Norway. Kafin a iya kafa da horar da kowane rukunin 'yan asalin ƙasar Norway da baƙi, yaƙin neman zaɓe a Norway ya ƙare a watan Yunin 1940, kuma gwamnatin Norway ta ƙaura zuwa Kingdomasar Ingila. Bayan ƙarshen yaƙe-yaƙe a Norway, Krefting ya yi aiki a kan al'amuran ma'aikata ga sojojin da ke gudun hijira da kuma dakarun jiragen ruwa na Norwegian.