Poland (Polish: Polska), officially the Republic of Poland (Polish: Rzeczpospolita Polska), is a country in Central Europe. It is bordered by Germany to the west, the Czech Republic and Slovakia to the south, Ukraine and Belarus to the east, and the Baltic Sea, Lithuania, and Russia (in the form of the Kaliningrad Oblast exclave) to the north. It also shares a maritime border with Denmark and Sweden. The first Polish state was born in 966. Poland became a kingdom in 1025, and in 1569 it cemented a long association with the Grand Duchy of Lithuania by uniting to form the Polish-Lithuanian Commonwealth. The Commonwealth collapsed in 1795, and the Poles were without a state for 123 years. Poland regained its independence in 1918 but lost it again in World War II, emerging several years later as a satellite of the Soviet Union. In 1989 it threw off the communist yoke and became what is informally known as the Third Polish Republic. Poland is member of the European Union, NATO, the United Nations, and the World Trade Organisation.