Lithuania

Lithuania is a country located in eastern Europe. It is currently in a personal union under Poland.

History
Lithuania supported Sweden's independence in 1445, and participated in the Swedish War for Independence. They left prematurely in 1446, when Lithuania's king Kazimierz I was elected to be the King of Poland. Since then, Lithuania has been in a personal union with Poland.

Lithuania gained the province of Memel (also known as Klaipeda) following the Prussian War, granting the nation access to the Baltic Sea. Despite directly bordering Muscovy, Lithuania did not gain any land during that war; all the conquered land went to Poland directly.