Mezue ahịrịokwu na-esonụ: Munthe-Kaas bụ nwa Otto H. Munthe-Kaas na nwanne Otto Ulrik Munthe-Kaas, ma ndị ọrụ agha. Nna ya bụ, tupu Agha Worldwa nke Abụọ, onye isi nke ogige ndị agha na Setermoen, ma bụrụkwa onye isi nke ndị agha nke abụọ na 16th Infantry Regiment n'oge mbuso agha German nke Norway. Hugo Munthe-Kaas nwere tupu mmalite nke agha ahụ, wepụtara onwe ya maka ụlọ ọrụ nche na Tromsø, ebe ọ jere ozi n'oge mwakpo ndị Germany. Mgbe ahụ, ọ sonyeere kọmishọna agha na Tromsø ma nabata ya maka ije ozi na 16th Infantry Regiment, n'agbanyeghị na ọ dị afọ abụọ karịa maka mbanye. Munthe-Kaas jere ozi n'oge agha ahụ na Northern Norway dị ka onye na-elekọta ndị ozi na ọrụ ozi na dịka onye na-agba ụta na
Agha Narvik. O jere ozi ya ruo mgbe ndị isi ala Norway nyefere onwe ha na 10 June 1940.