German occupation of Norway

https://en.wikipedia.org/wiki/German_occupation_of_Norway

Acceptance and collaboration

Of the Norwegians who supported the Nasjonal Samling party, relatively few were active collaborators. Most notorious among these was Henry Rinnan, the leader of the Sonderabteilung Lola (locally known as Rinnanbanden or "the Rinnan gang"), a group of informants who infiltrated the Norwegian resistance, hence managing to capture and murder many of its members.

Other collaborators were Statspolitiet (STAPO), a police force that operated independently of the regular police. Statspolitiet was closely related to the Quisling regime and took also orders directly from the German Sicherheitspolizei.

Hirden was a fascist paramilitary force with party members subordinate to the ruling party. Hirden had a broad mandate that included the use of violence.

Furthermore, about 15,000 Norwegians volunteered for combat duty on the Nazi side; of the 6,000 sent into action as part of the Germanic SS, most were sent to the Eastern front.