Poland and Lithuania established diplomatic relations from the 13th century, after the Grand Duchy of Lithuania under Mindaugas acquired some of the territory of Rus' and thus established a border with the then-fragmented Kingdom of Poland.
ROBERT FROST IN LUBLIN CASTLE on 1 July 1569, Sigismund August, king of Poland and grand duke of Lithuania, formally enacted an act of union bringing his two realms, joined since 1386 in what the textbooks call a loose personal union, into a closer relationship with a common Sejm (parliament) and a common council.
Poland and Lithuania have been linked together in this history because for 400 years (from the end of the 14th century to the end of the 18th) they were united - at first by a personal union under the king, and then by a full political union. As far as practicable this history is confined to that of Poland and Lithuania.
In the same year, the dynastic bond between Poland and Lithuania was transformed into a constitutional relationship by the Acts of the Lublin Diet, which described the Polish-Lithuanian state as a Commonwealth of Both Nations (Rzeczpospolita Obojga Narodów).
From the 31 December 2019 to the 21 March 2020, WHO collected the numbers of confirmed COVID-19 cases and deaths through official communications under the International Health Regulations (IHR, 2005), complemented by monitoring the official ministries of health websites and social media accounts. Since 22 March 2020, global data is compiled
Polish-Lithuanian War The Polish-Lithuanian War (in Polish historiography, Polish-Lithuanian Conflict [6] [7]) was an undeclared war between newly independent Lithuania and Poland following World War I, which happened mainly, but not only, in the Vilnius and Suwałki regions. The war is viewed differently by the respective sides.
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why did poland and lithuania unite