original_query: What roles did Kai Christian Middelthon Holst have during World War II?
query: What roles did Kai Christian Middelthon Holst have during World War II?
answer: Kai Holst was a Norwegian seaman, fur farmer, and resistance fighter during World War II.  He played a leading role in Milorg, helping to re-establish its central leadership after the Gestapo disrupted it in 1942. His work included courier duties, setting up a system for hiding refugees, and maintaining contact with key resistance figures. He also organised squads to eliminate dangerous German and collaborationist agents and was instrumental in training Jens Christian Hauge.