Editing Masuria (section)

=== Teutonic Order ===
[[File:Jan Matejko, Bitwa pod Grunwaldem.jpg|thumb|left|The [[Battle of Grunwald]] was fought in Masuria in 1410]]
After the Order's acquisition of Prussia, [[Polish people|Poles]] (or more specifically, [[Masovians|Mazurs]], that is inhabitants of the adjacent region of [[Mazovia]]) began to settle in the southeastern part of the conquered region. [[German people|German]], [[Dutch people|Dutch]], [[Flemings|Flemish]], and [[Danish people|Danish]]<ref>{{cite web|url=https://worldcometomyhome.blogspot.com/2012/09/0335-poland-warmian-masurian-land-of.html|title=WORLD, COME TO MY HOME!: 0335 POLAND (Warmia-Masuria) - Land of a thousand lakes|first=Danut|last=Ivanescu|date=19 September 2012|access-date=14 August 2018|archive-date=14 August 2018|archive-url=https://web.archive.org/web/20180814170346/https://worldcometomyhome.blogspot.com/2012/09/0335-poland-warmian-masurian-land-of.html|url-status=live}}</ref> colonists entered the area afterward, from the northwest. The number of Polish settlers grew significantly again at the beginning of the 15th century, especially after the [[Peace of Thorn (1411)|first]] and the [[Second Peace of Thorn (1466)|second]] treaties of Thorn ([[Toruń]]), in 1411 and 1466 respectively, following the [[Thirteen Years' War (1454–66)|Thirteen Years' War]] and the final defeat of the order.<ref name="britannica" /> The [[Battle of Grunwald]] took place in western Masuria in 1410. It was one of the largest battles of [[Middle Ages|medieval]] Europe and ended in a Polish-Lithuanian victory over the Teutonic Knights. In 1440 the anti-Teutonic [[Prussian Confederation]] was founded, and various towns of Masuria joined it.<ref>{{Cite book|last=Górski|first=Karol|title=Związek Pruski i poddanie się Prus Polsce: zbiór tekstów źródłowych|year=1949|publisher=Instytut Zachodni|location=Poznań|language=pl|pages=XXXVII–XXXVIII}}</ref> Western Masuria with [[Ostróda]], was, next to the [[Chełmno Land]], the place of the most widespread participation of the nobility in the foundation of the Confederation.<ref>{{cite book|last=Kętrzyński|first=Wojciech|author-link=Wojciech Kętrzyński|year=1882|title=O ludności polskiej w Prusiech niegdyś krzyżackich|language=pl|location=Lwów|publisher=[[Ossolineum|Zakład Narodowy im. Ossolińskich]]|page=608}}</ref> In 1454 upon the Confederation's request King [[Casimir IV of Poland]] signed the act of incorporation of the entire region including Masuria to [[Crown of the Kingdom of Poland|Poland]] and after the subsequent Thirteen Years' War Masuria became a part of Poland as a [[fief]] held by the [[Grand Master of the Teutonic Order]].<ref>Górski, pp. 54, 96–97, 214–215</ref>