Latvia–Lithuania relations
Latvia–Lithuania relations are bilateral international relations between Latvia and Lithuania. Latvia has an embassy in Vilnius, and Lithuania has an embassy in Riga. The two states share  of common border. Both countries are full members of the European Union and NATO. History

Medieval period

Relations between Latvian and Lithuanian ancestors - Baltic tribes - developed even in pre-state times (Baltic states). Linguistic, archeological and historical data shows this. From the 12th century the Baltic tribes were linked by a common struggle with the Livonian Brothers of the Sword (1202-37), later with the Order of Livonia. The state created by the Lithuanians - the Grand Duchy of Lithuania (GDL) - prevented the German states of the Livonian Confederation from germanizing the inhabitants of present-day Latvia, becoming a certain barrier to the emigration of Germans, primarily German peasants, to the Baltic lands, and encouraged Latvian resistance against the enslavers. During those battles, some of the tribes of the current territory of Latvia joined the GDL for a while. After the Battle of Aizkraukle in 1279, Duke Nameisis of the Semigalians recognized the supremacy of Grand Duke Traidenis of Lithuania and became a member of the Council of the Grand Duke of Lithuania. Lithuanian crews were stationed in several Semigalian castles. Lithuanian grand dukes Traidenis, Butigeidis and even later rulers of Lithuania (e.g. Gediminas) also used the title "Duke of Semigalia" in their full titles. Between 1281–1313 the GDL ruled Daugavpils, the lands up to Daugava and its surroundings. In the 13th century during the war with Livonia, many members of Curonians, Semigalians, Selonians and other tribes from the territory of present-day Latvia moved to Lithuania, strengthened its economic and military potential, and eventually merged into the emerging Lithuanian nation. It is believed that the Latgalians moved to their place, thus the territory of the Latvians expanded and their nation began to form. From the 13th century Riga was an important trade partner of GDL, a large part of foreign trade was conducted through the city. Lithuanian grand dukes Vytenis, Gediminas, later Vytautas and others, seeking to weaken the Livonian confederation, supported the fight of the Archbishop of Riga with the Livonian Order for the right to rule Riga and the fight of the citizens of Riga for the violation of their self-government rights. During the 13th-15th centuries at the beginning of the war between the estates of Livonia and Lithuania, a wide stretch of sparsely inhabited or uninhabited land, covered with forest was formed, the so-called "wasteland". In the beginning of the 16th century, during the internal colonization, the Lithuanian peasants turned many of the forests of that stretch into cultivated land, and founded villages; Lithuanian states naturally expanded to the north. From north to south, the Latvian peasantry did the same. The border between the possessions of Lithuania and Livonia, which settled over time, is shown by the treaty of 1529. According to it, some areas of present-day Southern Latvia belonged to the GDL; the border was established to the north of the current districts of Rokiškis (Dienvidsusēja), Pasvalys (Nemunėlis to Luopgalė), Pakruojis, Joniškis, Naujoji Akmenė districts (later, the border established in 1529 and coincided in many places with the northern border of Kaunas Governorate; the governorate included Aknīste, Grendza, Nereta, Šķirāni, Ukrai and other Lithuanian or mixed settlements). Early modern period

During the Livonian War (1558–83), the territory of present-day Latvia north of the Daugava was transferred to Lithuania, it became the Duchy of Livonia (1561–1677), which was an autonomous province of the GDL in 1561–69, later it belonged to the Polish-Lithuanian Commonwealth, and was administered by the Lithuanian and Polish dignitaries. To the south of the Daugava, the Duchy of Courland (1561–1795) under the Commonwealth was created. 1581–1621 Riga also belonged to the Commonwealth. After the Republic of the Polish–Swedish War (1600–1629) according to the Truce of Altmark (1629), the Commonwealth retained only the eastern part of present-day Latvia, which formed the historical and ethnographic region of Latgale. 16th-18th centuries Lithuanian settlements near Daugavpils reached Daugava (Lithuanian was spoken here until the beginning of the 19th century) and crossed it; the territory inhabited by Lithuanians is shown by the surviving names of settlements with the suffix -išk. From the 18th century until 1915, all of Latvia and most of Lithuania were ruled by the Russian Empire. In 1819, the Russian authorities assigned the Palanga counties,(which originally belonged to Lithuania) were given to the Curonian Governorate since they wanted the entire Baltic coast to be in one governorate, and the Aknīste counties (formerly belonged to the Curonian Governorate) to the Kaunas governorate. Interwar period

After the First World War, when the Baltic countries were creating independent states, on 1919 March 1st, the Lithuanian and Latvian governments signed an agreement in Kaunas, and Lithuania granted Latvia 5 million. mark loan, acquired the right to use the port of Liepaja duty-free for the transport of military and commercial cargo for a while; agreed to fight the Bolsheviks together. On September 8, 1919, Latvia recognized Lithuania de facto, on February 23, 1921 - de jure. Since 1919, there have been embassies of Lithuania in Riga and Latvian embassies in Kaunas. In 1923–29, the "Lithuanian vice-consulate" operated in Daugavpils, consulates in Riga, Liepaja, and until 1924 in Bauska. In 1919-20 there were disputes about the border of both states. It was established by the agreement of both parties on 1921 March by the arbitration commission (established in 1920; chairman J. Simpson). The border is essentially the northern border of the former Kaunas Governorate. According to the agreement, Lithuania received Palanga counties and the Šventoji-Palanga coastal stretch (183 km2), and Latvia received part of the northernmost Lithuanian settlements (Šķirāni and Ukrai) and disputed territories such as Aknīste, a total of 290 km2 (Latvia received a larger area, because the coastal territory was considered more valuable than the mainland). 20th century In the 1930s and 1940s, under a special agreement, the so-called Baltic Clause, the Baltic countries granted each other trade preferences that were greater than those of other most-favoured-nation countries. 12/01/1933 The Latvian-Lithuanian Small Border Communication and Cooperation Agreement was signed in Riga. On September 12, 1934, in Geneva, Estonia, Latvia and Lithuania signed the Treaty of Harmony and Cooperation between the States; the political diplomatic union Baltic Entente was formed. During the Soviet occupation

After the occupation of the Baltic countries by the USSR in June 1940, diplomatic missions and consulates of both nations countries continued to operate in the United States of America and other countries that did not recognize the Soviet annexation of the Baltic countries. After the end of the funds deposited by Lithuania in the United States of America, the diplomatic representatives of Latvia and Lithuania, with the mediation of officials of the State Department of the United States of America, agreed in 1980 on a loan to maintain Lithuanian embassies; to repay this loan in 2005 Lithuania and Latvia signed an Agreement on the repayment of the debt to the Republic of Latvia in connection with the maintenance of the Embassy of the Republic of Lithuania in Washington D.C.. The legal sovereignty of Latvia, Lithuania and Estonia was reminded to the world public by the remaining embassies and the communities of emigrants and war refugees who went to Western countries and fought for the restoration of the independence of the Baltic States. Joint white organizations were founded ("Baltic Committee", "Council of White Women"), joint publications were published ("Baltic Review", "Baltic News" and others). The struggle for the restoration of the independence of the three republics occupied by the USSR became more organized when the young generation of war refugees grew up. Due to the efforts of the organizations founded by it (American White Freedom League, United American White National Committee, World White Union and others) in 1982-91 in the United States of America and other countries, the Day of White Freedom was celebrated on a national scale, the Baltic Peace and Freedom Cruise was organized in 1985, the 1985 Copenhagen organized Baltic Tribunal; these and many other innovative actions reminded the society of Western countries and international organizations of the case of the freedom of the Baltic countries, and encouraged resistance to the Soviet occupation regime. From the 20th century In the Soviet Union of the 1960s, demonstrative cooperation of neighboring so-called "unionized republics", so-called "socialist racing", was encouraged (Latvian and Lithuanian cities, districts, companies, farms competed); meetings and connections of intellectuals (e.g. scientists, primarily Latvian and Lithuanian linguists, artists, actors, encyclopedists) contributed to the enrichment of the cultures of both nations. Joint folklore festivals, students and other celebrations, Baltic painting triennials were held. Lithuania and Latvia helped each other to train specialists in narrower specialties (in 1985, about 40 students from Lithuania studied at the Riga Polytechnic Institute, more than 100 from Latvia at the Kaunas Polytechnic Institute and Vilnius University). Relations between the fighters against the Soviet regime were also forged (in 1975 a joint memorandum of the Forty-five Baltic States was signed, other statements). Restoration of independence

In the late 20th century, the struggle against the Soviet occupation brought the nations of the Baltic countries closer together. In 1988-90, the society and numerous organizations led the struggle for the restoration of the independence of Latvia, Lithuania and Estonia. The Baltic Way (1989) and the Flaming Baltic Road (1991) are notable among their joint actions. The Baltic Assembly was established as institution for cooperation. Based on the principles of the 1934 Geneva Conference, Estonia, Latvia and Lithuania founded the Council of Baltic States on 12 May 1990 and the council operated until the end of 1992. On 22 August 1991, Lithuania recognized the independence of Latvia which was declared on 21 August 1991. The countries are represented by ambassadors residing in Riga and Vilnius. The Baltic countries are developing regional cooperation. According to the 1994 agreement, its main forms are: the Baltic Assembly, a cooperation organization of the parliaments of Estonia, Latvia and Lithuania, the cooperation of governments is coordinated by the Baltic Council of Ministers, and joint sessions of these organizations (Baltic Council) are held. The Forum of the Heads of State of the Three Baltic States is active (since 1990), now it is also called the Council of Baltic Presidents. The Baltic countries cooperate in the field of defense (Baltic Battalion, Baltic Air Surveillance Network, Baltic Naval Squadron, Baltic Defence College). Since the late 20th century countries cooperated in order to becomethe  members of NATO and the European Union. Their efforts were supported by the joint organizations of Baltic diaspora in the Western countries. Baltic Unity Day is celebrated every year on September 22. Economic relations

In 2020, the trade turnover between Latvia and Lithuania amounted to 4.9 billion euros. Lithuania exported 2.65 billion worth of goods to Latvia. Latvia mainly imported mineral fuel (15%), electrical machines and equipment and parts (10%) from Lithuania, Lithuania from Latvia - electrical machines and devices (17%). Latvia's direct investments in the Lithuanian economy in 2017 amounted to 493.5 million. euro while Lithuanian to Latvian economy - 1.057 billion. euros. In 2020, Latvia took first place in the Lithuanian inbound tourism sector. European Union 
Both countries became members of the European Union in 2004. NATO 
Both countries became members of NATO in 2004. Resident diplomatic missions

 Latvia has an embassy in Vilnius. Lithuania has an embassy in Riga. See also
Foreign relations of Latvia
Foreign relations of Lithuania
2004 enlargement of the European Union
Lithuanians in Latvia
Latvians in Lithuania

References

External links
  Embassy of the Republic of Latvia in the Republic of Lithuania
   Embassy of the Republic of Lithuania in the Republic of Latvia

 
Lithuania
Bilateral relations of Lithuania