Poland

historically an area of conflict because of flat terrain and the lack of natural barriers on the North European Plain

Poland's history as a state began near the middle of the 10th century. By the mid-16th century, the Polish-Lithuanian Commonwealth ruled a vast tract of land in Central and Eastern Europe. During the 18th century, internal disorder weakened the nation, and in a series of agreements between 1772 and 1795, Russia, Prussia, and Austria partitioned Poland among themselves. Poland regained its independence in 1918 only to be overrun by Germany and the Soviet Union in World War II. It became a Soviet satellite state following the war. Labor turmoil in 1980 led to the formation of the independent trade union Solidarity that over time became a political force with over 10 million members. Free elections in 1989 and 1990 won Solidarity control of the parliament and the presidency, bringing the communist era to a close. A "shock therapy" program during the early 1990s enabled the country to transform its economy into one of the most robust in Central Europe. Poland joined NATO in 1999 and the EU in 2004.

parliamentary republic. Independence: 11 November 1918 (republic proclaimed); notable earlier dates: 14 April 966 (adoption of Christianity, traditional founding date), 1 July 1569 (Polish-Lithuanian Commonwealth created)

high-income, diversified, EU-member economy; significant growth in GDP, trade, and investment since joining EU in 2004; private consumption and EU-funded public investments driving GDP growth; increased social spending, flooding recovery costs, and defense spending have added to public debt