 The totalitarian communist regime of the Soviet Union conducted large-scale and systematic actions against the Estonian population, including, for example, the deportation of about 10,000 persons on 14 June 1941 and of more than 20,000 on 25 March 1949.After the Second World War, tens of thousands of persons went into hiding in the forests to avoid repression by the Soviet authorities; part of those in hiding actively resisted the occupation regime.According to the data of the security organs, about 1,500 persons were killed and almost 10,000 arrested in the course of the resistance movement of 1944–1953.