As a result of the Molotov-Ribbentrop Pact, the occupied town became a part of the Soviet Union as a region of the Ukrainian SSR. The accession of the Western Ukraine to the Soviet Union (Reunion of Western Ukraine and USSR) – the adoption of the Soviet Union in Western Ukraine with the adoption of an Extraordinary Session V of the Supreme Soviet of the USSR Law "On the inclusion of the Western Ukraine in the Soviet Union to the reunification of the Ukrainian SSR" (1 November 1939) at the request of the Commission of the Plenipotentiary of the People's Assembly of Western Ukraine. The decision to file motions stipulated in the Declaration "On joining of Western Ukraine in the Ukrainian Soviet Socialist Republic" was adopted by the People's Assembly of Western Ukraine in Lviv, 27 October 1939.