In 1945, Interior Minister Yrjö Leino exposed a secret stay-behind army which was closed down (so-called "Weapons Cache Case"). This operation was organized by Finnish general staff officers (without foreign help) in 1944 to hide weapons in order to sustain large-scale guerrilla warfare in the event the Soviet Union tried to occupy Finland in following the end of combat on the Finnish-Soviet front of WWII. See also Operation Stella Polaris.