1922 Republic of Central Lithuania general election March 1922 and two days later the Republic of Central Lithuania ceased to exist. All of its territory was incorporated into the newly formed Wilno Voivodeship. The border changes were accepted by the Conference of Ambassadors of the Entente and the League of Nations. Lithuania declined to accept the Polish authority over the area and continued to treat the region as part of its own territory and Vilnius as its legitimate capital, with Kaunas designated only as a temporary seat of government. The Polish–Lithuanian diplomatic relations were not restored until the Polish ultimatum to Lithuania in 1938. 1922 Republic of
Lithuania July 1991, Soviet paramilitaries killed seven Lithuanian border guards on the Belarusian border in what became known as the Medininkai Massacre. On 17 September 1991, Lithuania was admitted to the United Nations. On 25 October 1992, the citizens of Lithuania voted in the referendum to adopt the current constitution. On 14 February 1993, during the direct general elections, Algirdas Brazauskas became the first president after the restoration of independence of Lithuania. On 31 August 1993, the last units of the Soviet Army left the territory of Lithuania. Since 29 March 2004, Lithuania has been part of the NATO. On 1