The Kingdom of Polandball was a historical countryball representing
stronk Polandball under a series of governments of the Jagiellonian dynasty. Despite his flag not being rectangular shaped, this country is named -ball. The non-ball version is more like an Anschluss form.
From the 12th to the 14th century, Poland-Lithuaniaball Polandball was in a long period of fragmentation (1138–ca. 1320. During the fragmentation Poland-Lithuaniaball Polandball lost Silesia and Pomerania. After the re-unitary Poland started to conquer the east territory. Poland gained a terrain of today Ukraine's clay, including the city of Lwówball.
United Kingdom of Poland History
In the mid-1320s, an agreement between the king of Poland, Władysław Łokietek, and Grand Duke of Lithuania, Gediminas, was made. Gediminas' daughter, Aldona, married Władysław Łokietek's son and future successor, Casimir III of Poland, in 1325, which led to improved relations between the two kingdoms.
Kingdom of Poland
In 1385, the growing threat of the Teutonic Order to both countries led to a closer alliance - the Polish-Lithuanian union, which marked the end of the Piast dynasty and the beginning of the Jagiellonian dynasty.
On 10 November 1444, Poland lost king fighting Kebab in Varna, and did not have a king for many days. At this point, Poland became an Elective Monarchy.
In 1569, the Kingdom of Polandball and Lithuaniaball merged into a single nation, the Polish-Lithuanian Commenwealthball, marking the ending of the Jagiellonian dynasty.