Operation Stella Polaris
Operation Stella Polaris was the cover name for activity in which Finnish signals intelligence records, equipment and personnel were transported into Sweden after the ending of the Continuation war in 1944. The threat of Soviet occupation was considered too likely and an operation was formed to support guerrilla warfare in Finland after occupation.
The leader of the operation was Colonel Reino Hallamaa, commander of Finland's code-breaking services.
- Matthew Aid. "Stella polaris" and the secret code battle in postwar Europe, Journal of Intelligence and National Security, Volume 17, Issue 3, September 2002, pages 17 - 86
- C.G.McKay, Bengt Beckman, Swedish Signal Intelligence, Frank Cass Publishers, 2002, p202