Poland began to form into a country around the middle of the 10th century in the Piast dynasty. In 966, Prince Mieszko I became a Christian, and so the Polish people also became Christians. The next king was Bolesław I of Poland (called Bolesław the Brave). He conquered many lands and he became the first King of Poland. Casimir I of Poland changed the Polish capital from Gniezno to Kraków. In the 12th century Poland broke into some smaller states after the death of King Bolesław III Wrymouth in 1138 because of his will. Those states were later attacked by Mongol armies in 1241, which slowed down the unification of the small states into the big country of Poland. This happened eighty years later, in 1320, when Władysław I became the King of the United Poland. His son Casimir III the Great reformed the Polish economy, built new castles and won the war against the Ruthenian Dukedom. Many people emigrated to Poland, becoming a haven for emigrants . Many Jewish people also moved into Poland during that time. The Black Death, which affected many parts of Europe from 1347 to 1351, did not come to Poland.
After the death of the last Piast on the Polish throne, Casimir III, Louis I of Hungary and his daughter Jadwiga of Poland began their rule. She married the Lithuanian prince Jogaila. Their marriage started a new dynasty in Poland: the Jagiellon dynasty. Under the Jagiellon dynasty, Poland made an alliance with its neighbor Lithuania.
In the 17th century Sweden attacked almost all of Poland (this was called “the Deluge”). Many wars against the Ottoman Empire, Russia, Cossacks, Transylvania and Brandenburg-Prussia ended in 1699. For the next 80 years, the government and the nation were weak, making Poland dependent on Russia. Russian tsars took advantage of this by offering money to dishonest members of the Polish government, who would block new ideas and solutions. Russia, Prussia, and Austria broke Poland into three pieces in 1772, 1793 and 1795, which dissolved the country. Before the second split, a Constitution called "The Constitution of 3 May" was made in 1791. The Polish people did not like the new kings, and often rebelled (two big rebellions in 1830 and 1863).
Napoleon made another Polish state, “the Duchy of Warsaw”, but after the Napoleonic wars, Poland was split again by the countries at the Congress of Vienna. The eastern part was ruled by the Russian tsar. During World War I all the Allies agreed to save Poland. Soon after the surrender of Germany in November 1918, Poland became the Second Polish Republic ("II Rzeczpospolita Polska"). It got its freedom after several military conflicts; the largest was in 1919-1921 Polish-Soviet War.
On September 1, 1939, World War II started when Nazi Germany attacked Poland. The Soviet Union attacked Poland on September 17, 1939. Warsaw was defeated on September 28, 1939. Poland was split into two pieces, one half owned by Nazi Germany, the other by the Soviet Union. More than 6 million Polish people died, and half of these people were Jewish. Most of these deaths were part of the Holocaust, in which 6 million Jews were killed. At the war's end, Poland's borders were moved west, pushing the eastern border to the Curzon line. The western border was moved to the Oder-Neisse line. The new Poland became 20% smaller by 77,500 square kilometers (29,900 sq mi). The shift forced millions of Poles, Germans, Ukrainians, and Jews to move.
After these events Poland gradually became a communist country. It was supposedly an independent country. But in reality the new government was appointed by Joseph Stalin. It was also under the control of the Soviet Union. The country was then renamed the People's Republic of Poland. There are many Poles in the neighboring countries Ukraine, Belarus, and Lithuania (these three countries were part of the Soviet Union until 1991), as well as in other countries. The most Poles outside of Poland are in the United States, especially in Chicago. Germany and the United Kingdom are also home to a large Polish diaspora. The most recent mass emigration of Poles to western countries began after 1989.
In 1989 Solidarity - a trade union led by Lech Wałęsa - helped defeat the communist government in Poland. Even before that event, Lech Wałęsa was given a Nobel Prize for leading the first non-communist trade union fighting for democracy in the Communist Block. When Communism ended in Poland there were many improvements in human rights, such as freedom of speech, democracy, etc. In 1991 Poland became a member of the Visegrad Group and joined NATO in 1999 along with the Czech Republic and Hungary. Polish voters then voted to join the European Union in a vote in June 2003. The country joined the EU on May 1, 2004.
Currently, the Prime Minister is Mateusz Morawiecki. On 10 April 2010 the President Lech Kaczyński died in a government plane crash in Smolensk in Russia. The president is elected directly by the citizens for a five-year term. The Prime Minister is appointed by the President and confirmed by the "Sejm". The Sejm is the lower chamber of Parliament legislature for the country. It has 460 deputies elected every four years.
Poland's territory is a plain reaching from the Baltic Sea in the north to the Carpathian Mountains in the south. Within that plain, the land varies from east to west.
The Polish Baltic coast is mostly smooth but has natural harbors in the Gdańsk-Gdynia region and Szczecin in the far northwest. This coast has several spits, dunes and coastal lakes. Coast lakes are former bays that have been cut off from the sea. These areas are sometimes called lagoons. Szczecin Lagoon is on the western border with Germany. The Vistula Lagoon is on the eastern border with Kaliningrad, province of Russia. The longest river in Poland, the Vistula river, empties into the Vistula Lagoon and also directly into the Baltic Sea.
The northeastern region is densely wooded, sparsely populated and lacks agricultural and industrial resources. The geographical region has four hilly districts of moraines and lakes created by moraines. These formed during and after the Pleistocene ice age. The Masurian Lake District is the largest of the four districts and covers much of northeastern Poland.
Poland has many lakes. In Europe only Finland has more lakes. The largest lakes are Śniardwy and Mamry. In addition to the lake districts in the north, there are also many mountain lakes in the Tatras mountains.
South of the northeastern region is the regions of Silesia and Masovia, which are marked by broad ice age river valleys. Silesia region has many resources and people. Coal is abundant. Lower Silesia has large copper mining. Masovian Plain is in central Poland. It is in the valleys of three large rivers: Vistula, Bug and Narew.
Further south is the Polish mountain region. These mountains include the Sudetes and the Carpathian Mountains. The highest part of the Carpathians is the Tatra mountains which is along Poland’s southern border. The tallest mountain in Poland, Rysy at 2,503 m (8,210 ft), is in the High Tatras.
Poland is made of sixteen regions known as voivodeships ("województwa", singular - "województwo"). They are basically created from the country's historical regions, whereas those of the past two decades (till 1998) had been focused on and named for separate cities. The new units range in areas from under 10,000 km (Opole Voivodeship) to over 35,000 km (Masovian Voivodeship). Voivodeships are controlled by voivod governments, and their legislatures are called voivodeship sejmiks.
The sixteen voivodeships that make up Poland are further divided into "powiaty" (singular "powiat"), second-level units of administration, which are about the same as to a county, district or prefecture in other countries.