The activities of the USSR State security agencies to ensure public safety in Lithuania during the interwar period

Importance. The events taking place in the territory of Lithuania in the interwar period are still controversial among politicians and historians today. Many “blank spots” of that time in this territory were closed for research for a long time, which gave rise to speculation and falsifications. The article examines the activities of state security agencies to ensure public security in the territory of Lithuania in the period from 1921 to 22.06.1941 using historical examples. The purpose of the study is to show the historical events taking place in Lithuania and the activities of the state security agencies to ensure public security in the interwar period in the republic. Materials and methods. The research is based on declassified archival documents of the State Archives of the Russian Federation and the Russian State Archives of Contemporary History. The materials of the People's Commissariat of Internal Affairs of the USSR – the Ministry of Internal Affairs of the USSR (1934–1960), the 4th Special Department of the Ministry of Internal Affairs of the USSR (1931–1959) and on political repression and rehabilitation of the illegally repressed were studied. Results and Discussion . As a result of the October Revolution of 1917, Lithuania gained its independence. Starting from 1919, nationalist organizations were created in Lithuania, the task of which was to voluntarily assist the police in the fight against the Communists and to assist intelligence agencies in espionage against the USSR. With the entry of Lithuania into the USSR, the activities of nationalists intensified. Before the attack on the USSR, the state security agencies launched a preventive blow against the nationalist underground and their accomplices, which reduced their activity in the initial period of the Great Patriotic War. Conclusion. The liquidation of the leaders of the nationalist underground and their accomplices allowed the USSR state security agencies to prevent the destabilization of public order in Lithuania on the eve of the German attack on the Soviet Union.