WSoviet Union in World War IIWA-A lineWBackground of the occupation of the Baltic statesWGerman–Soviet Commercial Agreement (1940)WInterim PeaceWKatyn massacreWSoviet occupation of the Baltic states (1940)WOccupation of the Baltic statesWOccupation of the Latvian Republic DayWSoviet submarine S-2WSoviet occupation of Bessarabia and Northern BukovinaWSoviet occupation of Latvia in 1940WSoviet ultimatum to LithuaniaWWinter War