State continuity of the Baltic states

The three Baltic countries, or the Baltic states – Estonia, Latvia, and Lithuania – are held to have continued as independent states under international law while under Soviet occupation from 1940 to 1991, as well as during the German occupation in 1941–1944/1945. The prevailing opinion accepts the Baltic thesis that the Soviet occupation was illegal, and all actions of the Soviet Union related to the occupation are regarded as contrary to international law in general and to the bilateral treaties between the USSR and the three Baltic countries in particular.

Source: Wikipedia — State continuity of the Baltic states (CC BY-SA 4.0)