Title: Käärmeenpesä
Subjects: Russo-Finnish War, 1939-1940, Military intelligence, Continuation War, 1941-1944, Espionage, World War, 1939-1945, Secret service, Intelligence service
Places: Finland, Sweden
People: Erkki Pale (1906-), Aladár Paasonen (1898-1974), Reino Hallam, Carl Gustaf Emil Mannerheim friherre (1867-1951)