Question: When did the country where Bērzaune Parish is located become part of the Soviet Union?

full_context: Document 1: Binə, Baku: Binə (also, Bina Staraya and Biny Selo) is a settlement and municipality in Baku, Azerbaijan. It has a population of 26,395. It is the nearest urban area to Baku Airport and was once home to one of the biggest markets in the country till that was moved to a location at the southernmost edge of Baku, near Lökbatan. The new market retains the name Binə Bazaar despite its lost geographical relevance.
Document 2: Alūksne: Alūksne () is a town on the shores of Lake Alūksne in northeastern Latvia near the borders with Estonia and Russia. It is the seat of Alūksne municipality. Alūksne is the highest elevated Latvian city, located in East Vidzeme Upland at 217 m above sea level. The high elevation of the city affects the social and physical arrangement of the place.
Document 3: Post-Soviet states: The post-Soviet states, also collectively known as the former Soviet Union (FSU) or former Soviet Republics, are the 15 independent states that emerged from the Union of Soviet Socialist Republics in its dissolution in December 1991, with Russia internationally recognised as the successor state to the Soviet Union. On March 11, 1990, Lithuania was the first to declare its independence, with Estonia and Latvia following suit in August 1991. All three Baltic states claimed continuity from the original states that existed prior to their annexation by the Soviet Union in 1944 and were admitted to the United Nations on 17 September 1991. The remaining 12 republics all subsequently seceded. 12 of the 15 states, excluding the Baltic states, initially formed the CIS and most joined CSTO, while the Baltic states focused on European Union and NATO membership.
Document 4: Dissolution of the Soviet Union: On June 14, 1987, about 5,000 people gathered again at Freedom Monument in Riga, and laid flowers to commemorate the anniversary of Stalin's mass deportation of Latvians in 1941. This was the first large demonstration in the Baltic republics to commemorate the anniversary of an event contrary to official Soviet history. The authorities did not crack down on demonstrators, which encouraged more and larger demonstrations throughout the Baltic States. The next major anniversary after the August 23 Molotov Pact demonstration was on November 18, the date of Latvia’s independence in 1918. On November 18, 1987, hundreds of police and civilian militiamen cordoned off the central square to prevent any demonstration at Freedom Monument, but thousands lined the streets of Riga in silent protest regardless.
Document 5: Rēzekne: Rēzekne (Latgalian "Rēzekne" or "Rēzne" , ; see other names) is a city in the Rēzekne River valley in Latgale region of eastern Latvia. It is called "The Heart of Latgale" (Latvian "Latgales sirds", Latgalian "Latgolys sirds"). Built on seven hills, Rēzekne is situated east of Riga, and west of the Latvian-Russian border, at the intersection of the Moscow – Ventspils and Warsaw – Saint Petersburg Railways. It has a population of 31,216 (2016) making it the 7th largest city in Latvia.
Document 6: Estonia: On 6 August 1940, Estonia was annexed by the Soviet Union as the Estonian SSR. The provisions in the Estonian constitution requiring a popular referendum to decide on joining a supra-national body were ignored. Instead the vote to join the Soviet Union was taken by those elected in the elections held the previous month. Additionally those who had failed to do their "political duty" of voting Estonia into the USSR, specifically those who had failed to have their passports stamped for voting, were condemned to death by Soviet tribunals. The repressions followed with the mass deportations carried out by the Soviets in Estonia on 14 June 1941. Many of the country's political and intellectual leaders were killed or deported to remote areas of the USSR by the Soviet authorities in 1940–1941. Repressive actions were also taken against thousands of ordinary people.
Document 7: Baldonas: Baldonas is a village in Penkule Parish and Dobele Municipality in the historical region of Zemgale, and the Zemgale Planning Region in Latvia.
Document 8: Baldone Municipality: Baldone Municipality () is a municipality in Zemgale, Latvia. The municipality was formed in 2008 by merging Baldone town and its countryside territory, with the administrative centre being Baldone. In 2010 Baldone parish was created from the countryside territory of Baldone town.
Document 9: Estonia: In 1989, during the "Singing Revolution", in a landmark demonstration for more independence, more than two million people formed a human chain stretching through Lithuania, Latvia and Estonia, called the Baltic Way. All three nations had similar experiences of occupation and similar aspirations for regaining independence. The Estonian Sovereignty Declaration was issued on 16 November 1988. On 20 August 1991, Estonia declared formal independence during the Soviet military coup attempt in Moscow, reconstituting the pre-1940 state. The Soviet Union recognised the independence of Estonia on 6 September 1991. The first country to diplomatically recognise Estonia's reclaimed independence was Iceland. The last units of the Russian army left on 31 August 1994.
Document 10: Ainata: Ainata, or sometimes known as Ainata-Al Ariz (Arabic:عيناتا الأرز) is a Lebanese village, 108 km from Beirut, located in Northern Lebanon, between the Bsharri District and the Baalbek District. Officially, Ainata is considered a village of the Baalbek District, but its inhabitants consider and prefer the village to be of the Bsharri District, mostly because its name "Ainata-Al Ariz" means "Ainata-The Cedars", in reference to the Cedars of God near Bsharri since most of the descendants are originally from Bsharri. Ainata rises 1620 meters above sea level and is sometimes considered as the highest Lebanese populated village (Although some books state that Bekaa Kafra is the highest).
Document 11: Molotov–Ribbentrop Pact: In mid-June 1940, when international attention was focused on the German invasion of France, Soviet NKVD troops raided border posts in Lithuania, Estonia and Latvia. State administrations were liquidated and replaced by Soviet cadres, in which 34,250 Latvians, 75,000 Lithuanians and almost 60,000 Estonians were deported or killed. Elections were held with single pro-Soviet candidates listed for many positions, with resulting peoples assemblies immediately requesting admission into the USSR, which was granted by the Soviet Union. The USSR annexed the whole of Lithuania, including the Scheschupe area, which was to be given to Germany.
Document 12: Monniaz: Monniaz is a village in the municipality of Jussy in Switzerland. At 513 metres it is highest place in the canton of Geneva and also its easternmost village. The highest point of the canton (516 m) is located north of Monniaz, near Les Arales (French border). It is also the lowest of the cantons' high points.
Document 13: History of Latvia: The First Latvian National Awakening began in the 1850s and continued to bear fruit after World War I when, after two years of struggle in the Latvian War of Independence, Latvia finally won sovereign independence, as recognised by Soviet Russia in 1920 and by the international community in 1921. The Constitution of Latvia was adopted in 1922. Political instability and effects of the Great Depression led to the May 15, 1934 coup d'état by Prime Minister Kārlis Ulmanis. Latvia's independence was interrupted in June -- July 1940, when the country was occupied and incorporated into the Soviet Union. In 1941 it was invaded and occupied by Nazi Germany, then reconquered by the Soviets in 1944 -- 45.
Document 14: Latvian Soviet Socialist Republic: Following the Welles Declaration of July 23, 1940, the annexation of Latvia into the Soviet Union (USSR) on 5 August 1940 was not recognized as legitimate by the United States, the European Community, and recognition of it as the nominal fifteenth constituent republic of the USSR was withheld for five decades. Its territory was subsequently conquered by Nazi Germany in June -- July 1941, before being retaken by the Soviets in 1944 -- 1945. Nevertheless, Latvia continued to exist as a de jure independent country with a number of countries continued to recognize Latvian diplomats and consuls who still functioned in the name of their former governments.
Document 15: Bērzaune Parish: Bērzaune parish () is an administrative unit of the Madona Municipality, Latvia. Close to the highest point in Latvia Gaiziņkalns, only 13 km away.
ground_truth: 5 August 1940
sub_queries: Bērzaune Parish >> country Answer: Latvia
when did Latvia become part of the soviet union Answer: 5 August 1940