GnieznoGniezno (AUDPl-Gniezno.ogg'gńe1zno; Gnesen; Gnesna) is a city in central-western Poland, about east of Poznań. Its population in 2021 was 66,769, making it the sixth-largest city in the Greater Poland Voivodeship. One of the Piast dynasty's chief cities, it was the first historical capital of Poland in the 10th century and early 11th century, and it was mentioned in 10th-century sources, possibly including the Dagome Iudex, as the capital of Piast Poland.
Invasion of PolandThe Invasion of Poland, also known as the September Campaign, Polish Campaign, War of Poland of 1939, and Polish Defencive War of 1939 (1 September – 6 October 1939), was a joint attack on the Republic of Poland by Nazi Germany, the Slovak Republic, and the Soviet Union; which marked the beginning of World War II. The German invasion began on 1 September 1939, one week after the signing of the Molotov–Ribbentrop Pact between Germany and the Soviet Union, and one day after the Supreme Soviet of the Soviet Union had approved the pact.
WarsawWarsaw, officially the Capital City of Warsaw, is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland. Its population is officially estimated at 1.86 million residents within a greater metropolitan area of 3.1 million residents, which makes Warsaw the 6th most-populous city in the European Union. The city area measures and comprises 18 districts, while the metropolitan area covers . Warsaw is an alpha global city, a major cultural, political and economic hub, and the country's seat of government.
SzczecinSzczecin (UKˈʃtʃɛtʃɪn , US-tʃiːn , ˈʂt͡ʂɛt͡ɕin; Stettin ʃtɛˈtiːn; Stettin stɛˈtiːn; Sedinum or Stetinum) is the capital and largest city of the West Pomeranian Voivodeship in northwestern Poland. Located near the Baltic Sea and the German border, it is a major seaport and Poland's seventh-largest city. the population was 395,513. Szczecin is located on the river Oder, south of the Szczecin Lagoon and the Bay of Pomerania. The city is situated along the southwestern shore of Dąbie Lake, on both sides of the Oder and on several large islands between the western and eastern branches of the river.
Władysław II JagiełłoJogaila (jɔˈɡâːɪɫɐ; 1352/1362 - 1 June 1434), later Władysław II Jagiełło (vwaˈdɨswaf jaˈɡjɛwwɔ), was Grand Duke of Lithuania (1377–1434) and then King of Poland (1386–1434), first alongside his wife Jadwiga until 1399, and then sole ruler of Poland. Born a pagan, he converted to Catholicism in 1386 and was baptized as Ladislaus (Władysław) in Kraków, married the young Queen Jadwiga, and was crowned King of Poland as Władysław II Jagiełło. In 1387, he converted Lithuania to Catholicism.
Russian EmpireThe Russian Empire, also known as Imperial Russia, was the final period of the Russian monarchy from its proclamation in November 1721, until its dissolution in late 1917. It consisted of most of northern Eurasia. The Empire succeeded the Tsardom of Russia following the Treaty of Nystad. The rise of the Russian Empire coincided with the decline of neighbouring rival powers: the Swedish Empire, the Polish–Lithuanian Commonwealth, Qajar Iran, the Ottoman Empire, and Qing China.
