Finland during the Winter War, which had taken place after Finland had failed by relying on the League of Nations and on Nordic neutrality. Finland aimed primarily to reverse its territorial losses from the Moscow Peace Treaty and, depending on the success of the German invasion of the Soviet Union, possibly to expand its borders, especially into East Karelia. Some right-wing groups, such as the Academic Karelia Society, supported a Greater Finland ideology. The Continuation War began in June 1941 and led to Finnish participation in the Siege of Leningrad as well as the Finnish occupation of East Karelia. Soviet Union The Soviet General Staff Supreme Command (Stavka) met in April 1940, reviewed the lessons of the Finnish campaign and recommended reforms. The role of frontline political commissars was reduced, and old-fashioned ranks and forms of discipline were reintroduced. Clothing, equipment and tactics for winter operations were improved. Not all of the reforms had been completed when Germans initiated Operation Barbarossa 14 months later. Between the Winter War and perestroika in the late 1980s, Soviet historiography relied solely on Molotov's speeches on the Winter War. In his radio speech of 29 November 1939, Molotov argued that the Soviet Union had tried to negotiate guarantees of security for Leningrad for two months. The Finns had taken a hostile stance to "please foreign imperialists". Finland had undertaken military provocation, and the Soviet Union could no longer abide by the non-aggression pacts. According to Molotov, the Soviet Union did not want to occupy or annex Finland, but the goal was purely to secure Leningrad. The official Soviet figure, with reference to the command of the Leningrad Military District, was published at a session of the Supreme Soviet on 26 March 1940, with 48,475 dead and 158,863 sick and wounded. More recent Russian estimates vary: in 1990, Mikhail Semiryaga claimed 53,522 dead, and N. I. Baryshnikov, 53,500. In 1997, Grigoriy Krivosheyev claimed 126,875 dead and missing and total casualties of 391,783, with 188,671 wounded. In 1991, Yuri Kilin claimed 63,990 dead and total casualties of 271,528. In 2007, he revised the estimate of dead to 134,000 and in 2012, he updated the estimate to 138,533. In 2013, Pavel Petrov stated that the Russian State Military Archive has a database confirming 167,976 killed or missing along with the soldiers' names, dates of birth and ranks. There were 5,572 Soviet prisoners of war in Finland. After