Prehistory
→ Main article: Prehistory of Poland
The prehistory of today's Poland dates back to the Paleolithic. In the Neolithic, it was successively in the sphere of influence of the Linear Pottery Culture, Funnel Beaker Culture, Globular Amphora Culture and Corded Ware Culture. During the Bronze Age, it was part of the Lusatian Culture and the Hallstatt Culture, respectively, from which the pile-dwelling settlement of Biskupin originates. It is also associated with the Hallstatt culture. At the transition from the Bronze to the Iron Age followed the Pomeranian Face Urn Culture and in the late Iron Age the Wielbark Culture. In ancient times the area of today's Poland came under Celtic and Thracian influence. Later the Przeworsk culture dominated. Via the Amber Road there was a lively cultural exchange with the Roman Empire. The Romans mentioned the cities of Kalisz and Truso already around the birth of Christ. The Germanic tribes of the Goths and Vandals settled around the birth of Christ coming from Scandinavia in today's northern and western Poland. During the Migration Period, Western Slavs and Balts moved through what is now Poland. Before the foundation of the Polish state, the Vikings, Avars and Magyars made raids into what is now southern Poland. The legends about the first prince Popiel, Piast, Lech and Siemowit are connected with this period. Southern Poland came under Moravian influence in the second half of the 9th century.
Piast
→ Main article: Kingdom of Poland, Piasts and Přemyslids
The Duchy of Poland, whose name derives from the West Slavic tribe of the Polans, was founded in the early 10th century from Greater Poland (Poznan, Giecz, Ostrów Lednicki and Gniezno). It was ruled from about 960 to 992 by Duke Mieszko I of the Piast dynasty, who gradually subjugated the other West Slavic tribes between the Oder and Bug rivers. Around 990, in the document Dagome Iudex, he placed Poland under the immediate protection of Pope John XV.
In 966 Mieszko I was baptized according to the Roman Catholic rite. The territory reached by conquests under Mieszko I borders, which were very close to the present state borders. His son Boleslaus I the Brave was the first Polish king. As early as 997 he concluded a political-military alliance with the Roman-German Emperor Otto III, which was confirmed during the Act of Gniezno in 1000. After the early death of the young Otto III, the relationship deteriorated under Henry II. , with whom Boleslaus I fought numerous wars over Lusatia. Boleslaus I temporarily extended his sphere of influence to present-day Slovakia, Bohemia and Moravia, and Kievan Rus. Under the rule of his son Mieszko II Lambert, a pagan uprising of Poles against the Catholic Church occurred in the late 1030s. Only his successor Casimir I the Renewer was able to calm the situation. In 1040 he moved the capital from Gniezno to Wawel in Kraków.
After the death of Boleslaus III Schiefmund in 1138, the seniorate constitution was introduced, according to which the sons of Boleslaus III ruled the individual parts of the country under them as junior dukes under the seniorate of the eldest of the dynasty. This feudal fragmentation lasted in Poland until 1295. This so-called particularism led to a strong political weakening of Poland in the 13th century. Poland disintegrated in 1138 into six duchies: Lesser Poland, Greater Poland, Pomerania, Pomerelia, Silesia and Mazovia, the so-called "Seniorate Poland". The years until reunification were characterized by feudal territorial fragmentation. The territory of Lesser Poland, located in the southeast, broke up into the noble territory of Sandomierz, eastern Greater Poland into the duchies of Łęczyca and Sieradz, and western Mazovia into the duchy of Kujawy. In Western Pomerania the Griffins gained independence from the Cracow senior in 1181, and in Pomerelia the Samborids in 1227. In 1295 Przemysł II of the Great Polish line of the Piasts succeeded in reuniting large parts of the country and had himself crowned King of Poland. However, he was assassinated already in the following year, and the Polish royal crown fell to the Bohemian Přemyslids Wenceslas I and Wenceslas II. After the latter was assassinated on the way to the coronation in Cracow, Ladislaus I Ellenlang from the Kujawy line of the Piasts succeeded in obtaining the Polish royal crown. With his son Casimir III the Great, the Piasts died out in the royal line in 1370, with the Mazovian Piasts dying out only in 1526 and the Silesian Piasts even in 1707. The last Piasts king, Casimir III the Great, successfully introduced reforms that helped the Kingdom of Poland achieve a powerful position in Central and Eastern Europe.
The Piasts brought numerous settlers to Poland, first the clergy and the Benedictines as well as Cistercians from France, the Holy Roman Empire as well as Italy, and especially after the depopulation of large parts of Poland in the course of the Mongol storm in the first half of the 13th century German peasants and townspeople, and especially Jews after the pogroms in Western Europe in the course of the plague epidemic in the middle of the 14th century, from which Poland was spared. Conrad I of Mazovia brought the Teutonic Order to Kulmerland in 1226, from where he subjugated Prussia. Casimir III the Great, on the other hand, extended the Jewish Toleration Edict of Kalish of Boleslaus VI the Pious to the whole Kingdom of Poland. He also began the Polish eastward expansion with the annexation of the principality of Halytsch-Volodymyr with Lemberg. With the Bohemian Luxembourgers, who continued to assert the claim to the Polish crown inherited from the Přemyslids, Casimir III the Great was able to come to an agreement in the Treaty of Namslau after meetings in Visegrád and Krakow, the Luxembourgers renounced the Polish crown and the Kujawi Piasts renounced the feudal sovereignty over Silesia. In 1364 Casimir III the Great founded the Krakow Academy as the second university in Central Europe. At the same time, Casimir the Great concluded a military alliance with the Hungarian King Charles I and an inheritance treaty with the latter's son Louis I of the House of Anjou, who married Casimir III the Great's sister Elizabeth of Poland, thus acquiring a claim to the Polish crown after Casimir III's death.
Jagiellonian
Casimir III, who died without a legitimate son, was succeeded by his brother-in-law Louis I of the House of Anjou by inheritance contract, which led to the first Polish-Hungarian personal union, as well as his daughter Hedwig I. The latter married the newly baptized Lithuanian Grand Duke Ladislaus II Jagiełło in 1386, creating the powerful dual state of Poland-Lithuania, which decisively influenced the fortunes of Central and Eastern Europe for the next 400 years. After the Battle of Tannenberg and the resulting heavy defeat of the Teutonic Order, Poland-Lithuania rose to become one of the leading continental powers and for a long time was the largest state in Europe, with spheres of influence from the Baltic to the Black Sea and from the Adriatic to the gates of Moscow. Under Ladislaus II Jagiełło's eldest son Ladislaus III came the second Polish-Hungarian personal union, which ended with Ladislaus III's death at the Battle of Varna. His brother Casimir IV. Andreas was able to win West Prussia and Warmia from the Teutonic Order during the Thirteen Years' War and make the rest of the Order's state a Polish fief. Through a clever dynasty and marriage policy he made the Jagiellons one of the leading royal families in Europe. His eldest son Ladislaus became king of Bohemia and Hungary, and his younger sons John I Albert, Alexander I and Sigismund I the Old became successively kings and grand princes in Poland-Lithuania. He married his daughters to the Bavarian Wittelsbachs, Prussian Hohenzollerns, Pomeranian Griffins, Saxon Wettins and Silesian Piast dynasty. So when Sigismund I the Old dissolved the Teutonic Order state in 1525 and transformed it into a secular duchy, he installed Albrecht, his nephew, as duke. In 1526, the previous Polish fief of Mazovia reverted to Poland with the death of the last Mazovian piast Janusz III. With the death of Louis II at the Battle of Mohács, the Jagiellonians lost Bohemia, Hungary and Croatia to the Ottomans and Habsburgs respectively. With Sigismund I the Old's only son Sigismund II. August, the Jagiellons also died out in the male line in 1572 and with his daughter Anna Jagiellonica in 1596 completely in Poland-Lithuania.
Noble Republic
Poland was designated a republic in 1358. However, the republican form of government probably did not prevail until around the middle of the 15th century and, with a steady three-chamber parliament, was not fully developed until the end of the 15th century. With the Nihil Novi constitution adopted in 1505, the Sejm forbade the king to enact new laws without parliamentary approval. At the instigation of the last Polish king from the Jagiellonian dynasty, Sigismund II. August, the personal union between Poland and Lithuania was transformed into a real union in Lublin in 1569. Since 1569 Poland and Lithuania together formed a noble republic and thus the first modern state in Europe with a noble republican system and a separation of powers. In 1578 a Supreme Court for Poland-Lithuania, the Crown Tribunal in Lublin, independent of the king and the Sejm, was established. The Polish nobility elected first the Frenchman Henry I Valois, from whom they demanded religious freedom, and later the Transylvanian Stephen I Báthory as Polish-Lithuanian king. Later, three kings from the Swedish Vasa dynasty, related to the Jagiellonians, followed: Sigismund III Vasa (short personal union with Sweden), Ladislaus IV Vasa (short personal union with Russia), and John II. Casimir. Polish magnates were elected with Michael I Korybut Wiśniowiecki, John III Sobieski and Stanislaus I Leszczyński, and Saxon Wettins with August II the Strong and August III. The last elected Polish king was Stanislaus II August Poniatowski. The Golden Age of the noble republic is considered to be the period up to the half of the 17th century. After that Poland-Lithuania was involved in numerous wars, including the Battle of Kahlenberg during the Great Turkish War.
Divisions
The noble republic plunged into a permanent crisis in the 17th and 18th centuries, characterized by numerous wars (with Sweden, the Ottoman Empire, Russia, Brandenburg-Prussia and Transylvania), lack of political reforms and internal unrest. There was the formation of magnates (so-called confederations against the interests of the state and the king), Cossack uprisings and permanent confrontations with the Crimean Tatars in the southeastern voivodeships. Especially the election of foreign dynasts as Polish kings (they had no domestic power in Poland and were dependent on the goodwill of the high nobility) and the disunity within the Polish nobility, the szlachta and magnates, weakened the state considerably. In particular, the so-called Saxon period is considered from the Polish point of view to have had a negative impact on the further existence of the Polish state.
Even the ratification of a constitution in 1791, the first modern constitution ever in Europe, could not stop the decline of the Polish-Lithuanian noble republic. In the three partitions of Poland in 1772, 1793 and 1795, Poland's internal weakness was exploited by its neighbors Prussia, Austria and Russia, which simultaneously invaded Poland and in the end divided it among themselves. Poland was thus deprived of its sovereignty and its original territory was incorporated into three different states. The last Polish king Stanislaus II August Poniatowski had to abdicate and was taken to Saint Petersburg, where he died in 1798. At the same time, however, Polish legions were established in French-occupied northern Italy and France under Jan Henryk Dąbrowski as early as 1796, whose goal was to re-establish the Polish-Lithuanian Republic with French help.
In 1807, at the insistence of the French Emperor Napoleon, a relatively small Duchy of Warsaw was created as a vassal state of France from the Prussian acquisitions of the Second and Third Partitions. In 1809, after short warlike conflicts, parts of Lesser Poland in what was then Western Galicia were ceded again by Austria to the Duchy of Warsaw. Due to the defeats of the Polish-French alliance in the Russian campaign in 1812 and in the Battle of Leipzig in 1813, the Polish-Lithuanian Republic was not restored and the Duchy of Warsaw was partitioned at the Congress of Vienna, which was dominated by the partitioning powers. Large parts of Greater Poland reverted to Prussia as the province of Posen. Kraków became a city-state, the formally independent Republic of Kraków until 1846. The remainder, Congress Poland, named after the Congress of Vienna, was united as the Kingdom of Poland in 1815 in personal union with the Russian Empire, and was thus at first formally independent of the Russian Empire except for the common ruler. Until 1831, this Polish polity enjoyed extensive autonomy. With the rise of Russian nationalism in the transition from feudal society to capitalism, the tsarist administration attempted to abolish this autonomy step by step.
As a result of the recruitment of Poles for the Russian army to fight the Belgian Revolution, the November Uprising of 1830 broke out in Warsaw, in which the Poles tried to shake off Russian foreign domination and dominance. The November Uprising was put down by the Russian army in 1831. With the defeat, the Polish population was subjected to increased Germanization - according to the Prussian censuses without any major impact on population proportions - and Russification since 1831 in the Prussian and Russian occupation zones, which was particularly forced after the second, failed uprising, the January Uprising of 1863. The name Poland was banned and the country was called Vistula Land by the Russian authorities. The Hohenzollerns in Pomerelia and Wielkopolska proceeded similarly: Poles appear as a nationality in censuses, but as a contemporary geographical term, Poland is restricted to the Russian part in Prussian textbooks and all German-language map works. Only in Austrian-occupied Polish Galicia were Poles able to escape intellectual and national oppression in the Prussian- and Russian-dominated parts of Poland through the political reforms of the House of Habsburg-Lorraine in the Danube Monarchy since 1867. In the Russian part, on the other hand, the 1905 revolution marked a turning point, in which socialist demands initially dominated, but later the demand for national independence gained ground.
World War I
With the outbreak of the First World War, the Central Powers, especially Austria-Hungary, established Polish Legions under the command of Józef Piłsudski. During the First World War, the German and Austro-Hungarian Empires decided to establish an independent Polish state on the territory of Congress Poland taken from the Russian Tsarist Empire. However, this was a measure directed against Russia rather than recognition by the Central Powers of the right of all Poles to statehood. In 1916, the Regency Kingdom of Poland, named in analogy to the decision of the Congress of Vienna, was proclaimed by the German Empire. For this purpose, the Provisional Council of State in the Kingdom of Poland was established, which met in Warsaw's Kronenberg Palace from 1916 to 1918 and was headed by the triumvirate of Józef Ostrowski, Aleksander Kakowski and Zdzisław Lubomirski. Due to wartime events, the Provisional Council of State had limited practical impact in the Kingdom of Poland. However, Józef Piłsudski and his legions laid down their arms after the Russian October Revolution in 1917 and refused to continue fighting for the Central Powers, since the war goal of the Polish Legions had already been achieved with the defeat of Russia. Józef Piłsudski was then interned in Magdeburg. His return to Poland after the defeat of the Central Powers was the occasion for the proclamation of the independent Second Polish Republic in Warsaw on November 11, 1918. In addition to Piłsudski, who came from the socialist camp, Roman Dmowski and Ignacy Jan Paderewski, who came from the bourgeois camp, were also active for Polish independence at the end of the First World War.
Second Republic
Woodrow Wilson made it clear as early as 1917, when the U.S. entered the war, in the 14-Point Program, that an independent Poland with access to the Baltic Sea was one of the U.S. war aims. After the defeat of the Central Powers, Poland regained its sovereignty. On November 11, 1918, the Second Polish Republic was proclaimed. Universal suffrage for women was introduced at the same time as the corresponding right for men. This was done by the decree of 28 November 1918 on the electoral procedure for the Sejm shortly after the new foundation of the Polish state. Article 1 guaranteed the right to vote, Article 7 the right to stand for election.
The Peace Treaty ofVersailles confirmed the independence of the Republic of Poland in 1919 in the international framework. Poland was thus a founding member of the League of Nations. At the same time, the Polish Minority Treaty of June 28, 1919, agreed on the protection of the German minority in Poland.
The victorious powers established borders in Central and Eastern Europe according to population majorities. The British Foreign Secretary Lord George Nathaniel Curzon was in charge of this. The Weimar Republic was forced to give up most of the Prussian provinces of West Prussia and Posen. They had been annexed by the Kingdom of Prussia as part of the partitions of Poland. Immediately afterwards, 200,000 Germans left the territories granted to the Republic of Poland.
Due to the unclear political situation after the collapse of the Hohenzollern and Romanov monarchies, conflicts with neighboring states arose during the first consolidation phase of the new state, for example with Germany over Upper Silesia in the Battle of St. Annaberg or over the city of Vilnius in present-day Lithuania.
Beginning in March 1919, Poland succeeded in capturing large parts of Ukraine and Belarus in the Polish-Soviet War. A Soviet counteroffensive followed, which was initially successful. However, in the Battle of Warsaw in 1920, the Red Army was repulsed with heavy losses, after which it retreated all the way to Ukraine. After Marshal Józef Piłsudski's victory against the Bolsheviks on the Vistula, the Riga Peace Treaty of March 18, 1921, established Poland's eastern border about 250 km east of the Curzon Line.
The Curzon Line marked the eastern border of the closed Polish settlement area, while the eastern areas (Kresy) had a mixed population structure of Poles, Ukrainians, Belarusians, Lithuanians, Jews and Germans, with Poles dominating in many cities and the other population groups in the countryside. While the majority of the population in the cities was mostly Roman Catholic or Jewish, the rural population was predominantly Orthodox. Nevertheless, Piłsudski failed in his goal of establishing Ukraine as an independent "buffer state" between Poland and Soviet Russia. At Riga, Poland recognized Ukraine as part of what would later become the Soviet Union under Mykola Skrypnyk. In the territories granted to Poland by Soviet Russia, east of the Western Bug, Poles constituted 25% of the population in 1919; by 1939, after a settlement policy favoring Poles during Piłsudski's tenure, the figure was already about 38%. Polish language islands in the surrounding area, which was majority Ukrainian or Belarusian depending on the region, were the regions around Pinsk, Łuck, Stanisławów and Lemberg (Lwów). In total, out of 13.5 million inhabitants in the area in 1939, there were about 3.5 million Poles. The Vilnius rayon municipality has remained majority Polish-speaking to this day, and the city of Vilnius forms a Lithuanian-language island after the forced relocation of its Polish urban residents after the war.
The internal consolidation of the new state was made more difficult by the fragmentation of political parties, the different economic, educational, judicial and administrative systems that emerged during the partition era, and the existence of strong ethnic minorities (31 % of the total population). In foreign policy, Poland was initially included in the French alliance system. A restrictive policy toward the German minority, which led to the emigration of about one million German-speaking citizens, the refusal of the Stresemann government to recognize the new German eastern border, a "tariff war" over Upper Silesian coal, and the political-ideological opposition to the Soviet system precluded Poland's cooperation with its two largest neighbors.
On May 12, 1926, Marshal Piłsudski won power after a coup d'état (1926-1928 and 1930 as prime minister, 1926-1935 as minister of war). Non-aggression treaties were concluded with the Soviet Union (1932) and the German Reich (1934) to safeguard foreign policy. Foreign Minister Józef Beck sought Poland's rise as an East-Central European hegemonic power within the framework of a new Europe stretching from the Baltic to the Adriatic. However, his plans failed due to the geopolitical situation. Despite the world economic crisis in 1929, the economy was able to develop in the Second Polish Republic. Ambitious projects such as the construction of the port city of Gdynia and the Central Industrial Region were realized. A sign of the luxury of the interwar period were the Luxtorpeda express trains, which ran, among other things, between Krakow and the increasingly popular mountain resort of Zakopane.
Shortly before Poland itself was attacked by Nazi Germany, it made territorial demands on Czechoslovakia in the wake of the Munich Agreement. In October 1938, against the will of the Czech government, Poland annexed the Olsa region, inhabited by a majority of Poles, which had been occupied by Czechoslovakia in 1919.
World War II
In August 1939, the German Reich and the Soviet Union concluded the Hitler-Stalin Pact, in whose secret additional protocol the joint invasion of Poland and the annexation of the Baltic states by the Soviet Union were decided. On September 1, 1939, Poland was attacked by the German Reich. Troops from the German vassal state of Slovakia also advanced into Polish territory. This marked the beginning of World War II, in which 5.62 to 5.82 million Polish citizens, including almost half of Jewish descent, were to lose their lives. After losing the western parts of the country to the German invaders, the Soviet occupation of eastern Poland began on September 17 under the pretext of "protecting" the White Russian-Ukrainian population through the invasion of the Red Army. The annexation and division of the Polish territory had been previously decided by the dictators in a secret additional protocol to the Hitler-Stalin Pact. Subsequently, on the night of September 17-18, 1939, the Polish government left Poland via the still free border crossing at Kuty (now in Ukraine) and went to neutral Romania, later to Paris and in 1940 to London. From there she organized the resistance against the German and Soviet occupation.
Hitler made it clear early on that he envisaged the "liquidation of leading Poles" (Reinhard Heydrich). In the first four months of German occupation alone, several 10,000 people were shot (Unternehmen Tannenberg). In the early 1940s, the Nazis established several concentration camps on the territory of Poland, including the Auschwitz, Majdanek and Treblinka concentration and extermination camps. The occupation period had catastrophic consequences for large parts of the Polish civilian population. In the country, which was originally home to more than three million Jews, the Nazis waged a so-called "Volkstumskampf" (ethnic struggle) in which 5,675,000 civilians fell victim. In accordance with the Hitler-Stalin Pact, Poland was occupied and partially annexed by the Wehrmacht in the west and the Red Army in the east.
The overarching goals of occupation policy in the entire area included, first, the elimination and extermination of Polish Jews and the Polish intelligentsia; second, the advancement of Germany's eastern border and the expansion of "Lebensraum im Osten" (Generalplan Ost); and third, the strengthening of the German war economy by exploiting the labor potential of forced laborers and Poland's material resources. Greater Poland, the parts of western Prussia ceded to Poland in 1919, and eastern Upper Silesia were annexed directly by Germany. Lesser Poland, Mazovia and Galicia, with about ten million people, were placed under the control of Reich Minister Hans Frank as the so-called General Government. He directed the extermination policy from the Wawel, the Krakow royal seat of the early Polish kings. During his reign, he organized the looting of looted art from Polish museums, churches and private collections on an unprecedented scale.
Poles who came under Soviet rule were also affected by violent measures. It is estimated that about 1.5 million former Polish citizens were deported. 300,000 Polish soldiers went into Soviet captivity, only 82,000 of them survived. A large number of the officers, about 30,000 persons, were murdered by Soviet troops in 1940 in the Katyn massacre and in the prisoner-of-war camps of Starobelsk, Kozelsk and Ostashkov. Even before the outbreak of World War II, Stalin had had over 100,000 Poles murdered in the Soviet Union in the NKVD's Polish Operation. The murder of Soviet communists continued after World War II in Poland, which was once again occupied by the Soviet Union.
After the German Reich attacked the Soviet Union in 1941, the Anders Army was formed in the Soviet hinterland from Polish soldiers in the strength of six divisions. However, due to lack of equipment and rations, these units were transferred to the Middle East via Persia as early as 1942, where they were placed under the British Middle East Command. Later, as the 2nd Polish Corps, they fought in Palestine, Africa and Italy, where, among other things, they were able to capture the Monte Cassino monastery from the Wehrmacht.
Polish soldiers fought on the side of the Allies on almost all fronts of the Second World War, from the Battle of Britain, in Africa, the Soviet Union, to the invasion ofNormandy and Italy. Polish soldiers thus constituted the fourth largest Allied army on the European continent, ahead of the French. Polish partisan groups, which represented the largest resistance movement in occupied Europe, also resisted in Poland itself. After the Red Army crossed the 1939 Polish border in January 1944, the Home Army troops were disarmed by the NKVD, and their officers were shot or sent to the Soviet Gulag. The struggle of individual underground units against the Soviet-dependent communist regime continued until the late 1940s.
On August 1, 1944, on the orders of the London government-in-exile, the Warsaw Uprising began. The Soviet Union, whose troops were already on the eastern bank of the Vistula, provided almost no support to the Home Army units. The great distance made effective help from the Western Allies impossible. Thus, German occupation forces were able to crush the largest European uprising against them. The number of dead is estimated at 180,000 to 250,000. Afterwards, the inner city of Warsaw was almost completely destroyed with a large amount of explosive material.
See also: Polish Underground State, Polish Armed Forces in the West, and Polish Armed Forces in the Soviet Union.
People's Republic
After the end of World War II in 1945, the borders of the former Polish territory were shifted westward in accordance with the Potsdam Agreement. Poland lost the ethnically mixed third of its former territory, populated mostly by Ukrainians and Belarusians, to the Soviet Union. The Polish population living there, about 1.5 million people, were expelled to Poland as repatriates. Already in 1943-1944, tens of thousands of Poles had been murdered in the massacres in Volhynia, and hundreds of thousands had been forced to flee.
In the west and north, the German territories east of the Oder and Neisse rivers (Oder-Neisse line) were granted to Poland until in accordance with the specifications of the Allied conferences in Tehran, Yalta and Potsdam. About five million Germans had fled from there toward the end of the war and were prevented from returning by entry bans; after the war, another 3.5 million people were displaced. Some German- and Polish-speaking Upper Silesians and Masurians remained in Poland. Many who had German names had them changed to Polish names. The use of the German language was restricted by officials, especially in Silesia, at least until the 1970s.
The reclaimed territories were settled by three million citizens from central Poland, about one to two million fugitives and displaced persons from eastern Poland and, in 1947, about 150,000 Ukrainians and Ruthenians resettled by Aktion Weichsel from the border area with the Soviet Union.
With the Görlitz Agreement between the newly formed GDR and the Polish People's Republic of July 6, 1950, this border demarcation was recognized by the GDR, and by the treaty concluded in Warsaw on December 7, 1970, by the Federal Republic of Germany.
The German occupation during World War II was followed by the communist dictatorship imposed by the Soviet occupation. Poland was added to the Soviet Union's sphere of influence and became part of the Warsaw Pact as the People's Republic of Poland. During Stalinism, the puppet government consisted of the triumvirate of Jakub Berman, Hilary Minc and Bolesław Bierut. Beginning in 1956, after uprisings, there was a de-Stalinization under Communist Party Chairman Władysław Gomułka. Gomułka was succeeded by Edward Gierek in 1970 and Stanisław Kania in 1980 until Jaruzelski's junta seized power in 1981. Poland was included in the Council for Mutual Economic Assistance and the Warsaw Pact until 1989. Through several uprisings, the Polish population repeatedly expressed its displeasure with the Soviet occupation, for example, in the Poznan Uprising of 1956, the March Riots of 1968, the Gdansk Uprising of 1970, the People's Uprising in Radom and Ursus near Warsaw in 1976. In 1956, the Poles showed solidarity to a very high degree with the Hungarians, whose uprising against Soviet foreign rule was bloodily put down. In 1968, the troops of the Polish People's Republic under General Wojciech Jaruzelski participated in the military suppression of the Prague Spring.
It was only the establishment of the Solidarność trade union after the first papal visit of John Paul II in 1979 that finally led to a socio-political turnaround in and to the revolutionary events of 1980-1989, which resulted first in the imposition of martial law and finally in the Round Table Talks and the first partially free elections in the Eastern Bloc on June 4 and 18, 1989. At their end, the so-called Eastern Bloc and subsequently the Soviet Union were dissolved and the real socialist regime was replaced by a democratic form of government. Lech Wałęsa's role in the Solidarność trade union is controversial in this context.
Third republic
→ Main article: Third Polish Republic
In the partially free parliamentary elections of June 4-18, 1989, the Solidarność Civic Committee, the political organization of the Solidarność trade union, won all 161 of 460 freely elected seats in the Sejm and 99 of 100 seats in the reinstated Senate. Tadeusz Mazowiecki was elected the first prime minister of the Third Republic of Poland; he thus became the first head of government of a Warsaw Pact state who was not a member of the Communist Party at the time of his election. On December 29, 1989, the Constitution was amended. The provisions on the alliance with the Soviet Union and the Eastern Bloc states and the leading role of the Communist Party were deleted, and the former state name "Rzeczpospolita Polska" (Republic of Poland) was reintroduced with the old coat of arms. In 1991, membership in the Warsaw Pact ended with the dissolution of the military alliance.
The planned economy was transformed into a market economy. In accordance with the controversial Balcerowicz Plan, numerous state-owned enterprises were privatized in a short period of time, with a great many employees losing their jobs. In December 1990, former Solidarność chairman Lech Wałęsa was elected president in a popular election. Wałęsa saw numerous changes in government. In particular, the overthrow of the Jan Olszewski government in 1992 is the subject of controversy in Poland, as Wałęsa apparently tried to thwart the publication of a list of secret service employees among Poland's top politicians, on which he himself was on.
Polish confidence in Wałęsa declined, and in December 1995 he lost the presidential election to challenger and former communist youth minister of the 1980s Aleksander Kwaśniewski. During Kwaśniewski's tenure, Poland joined NATO in 1999 and the European Union in 2004. A new constitution was adopted by the Sejm and Senate on April 2, 1997, and approved by referendum on May 25, 1997, although less than 50% of those eligible to vote participated. It entered into force on October 17, 1997. On May 1, 2004, Poland became a member of the European Union along with nine other states. Among the 13 new member states, Poland is the most populous and the largest country in terms of area. During the conflict over the presidential elections in neighboring Ukraine in November and December 2004, Polish President Aleksander Kwaśniewski acted as a mediator between the conflicting parties, while large sections of the Polish public and many media outlets showed a particularly high degree of solidarity with Ukraine and its new president, Viktor Yushchenko.
The parliamentary elections of 2005 led to a change in policy in Poland. The SLD, which had ruled until then, was voted out by a conservative alliance. The winner of the Sejm and Senate elections was Jarosław Kaczyński's national conservative PiS, ahead of the liberal-conservative PO. Lech Kaczyński, Jarosław's twin brother, subsequently won the presidential election in October 2005. In the early parliamentary elections on October 21, 2007, the PiS lost its position as the strongest party.
From November 2007 to 2015, the liberal-conservative PO and its coalition partner, the Peasant Party PSL, formed the government. First under Prime Minister Donald Tusk, and from 2014 one under Ewa Kopacz.
On April 10, 2010, a Polish government plane carrying 96 occupants crashed near Smolensk. Among the fatalities were Poland's President Lech Kaczyński and his wife Maria, numerous members of parliament, members of the government, high-ranking officers, church representatives, senior representatives of central authorities, and representatives of associations of victims' relatives of the Katyn massacre. The reason for the crash remains unclear to this day and is still under investigation.
After the presidential election in May 2015, Andrzej Duda replaced the previous incumbent Bronisław Komorowski as president. The parliamentary election in October 2015 brought a landslide victory for the national conservative PiS, which was able to form the first sole government in Poland since 1989 with 37.6% and 235 of 460 deputies. That same year, judicial reforms began Poland's constitutional crisis.