The Soviet Union occupied most of the territory of the Baltic states in its 1944 Baltic Offensive during World War II. The Red Army regained control over the three Baltic capitals and encircled retreating Wehrmacht and Latvian forces in the Courland Pocket where they held out until the final German surrender at the end of the war. The German forces were deported and the leaders of Latvian collaborating forces were executed as traitors. After the war, the Soviet Union reestablished control over the Baltic territories in line with its annexations as communist republics in 1940.
The day is not far off when we will completely liberate the Ukraine, and the White Russia, Leningrad and Kalinin regions from the enemy; when we will liberate … the people of the Crimea and Lithuania, Latvia, Estonia, Moldavia and Karelo-Finnish Republic.
By 2 February 1944 the siege of Leningrad was over and the Soviet troops were on the border with Estonia. Having failed to break through, the Soviets launched the Tartu Offensive on 10 August, and the Baltic Offensive on 14 September with forces totalling 1.5 million. The High Command of the German Army issued Operation Aster on 16 September, whereby the Estonian forces would cover the German withdrawal. Soon after the Soviet reoccupation of the Estonian capital Tallinn, the first mission of the NKVD was to stop anyone escaping from the country; however, many refugees did escape to Sweden or Finland, particularly the Estonian Swedes, who had lived in coastal Estonia since they days of Danish and Swedish Estonia. The NKVD also targeted members of the National Committee of the Republic of Estonia. The Estonian Forest Brothers (established in 1941) initially maintained a low profile during the Soviet reoccupation. The 1945 VE Day did not bring a restoration of independence to Estonia, and the Forest Brothers then renewed their campaign of killing Soviet senior armed forces and NKVD officers.