C-byrån ("C bureau") was a Swedish secret intelligence agency established in 1939, sorting under the Swedish Armed Forces. It was led by Major Carl Petersén. During World War II C-byrån organized operations in the German-occupied Norway and Operation Stella Polaris in Finland. History. When World War II broke out in 1939, Sweden lacked a modern military intelligence agency. Major Carl Petersén was assigned to establish it.
https://en.wikipedia.org/wiki/C-byr%C3%A5n