Vidkun Quisling was a member of the Norwegian government before resigning to form the fascist Nasjonal Samling Party in 1933. After the Nazi invasion of Norway in April 1940, he proclaimed himself head of the Norwegian government.
Quisling's regime was extremely fragile due to a lack of popular support, and it collapsed within a week. However, he continued to serve the Reich as commissioner for Norway. He remained in power until his arrest following the liberation of Norway in May 1945. He was charged and convicted of murder, theft, embezzlement, and treason. Quisling was executed on October 24, 1945. In modern-day Norway, his name is synonymous with the word "traitor".