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

Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east, Belarus to the southeast, and shares a maritime border with Sweden to the west. Latvia covers an area of 64,589 km2 (24,938 sq mi), with a population of 1.9 million. The country has a temperate seasonal climate. Its capital and largest city is Riga. Latvians belong to the ethnolinguistic group of the Balts and speak Latvian, one of the only two surviving Baltic languages, a branch of the Indo-European language family. Russians are the most prominent minority in the country, at almost a quarter of the population.