1410 in Poland

• Monarch: Władysław II Jagiełło

Polish-Lithuanian-Teutonic War:

• 9 July: The Polish-Lithuanian army enters the territory of the Teutonic order

• 12 July: Emperor Sigismund of Luxemburg declares war on Poland; Działdowo conquered by the allied army

• 13 July: Dąbrówno (with its important Teutonic fortress) is conquered; the Teutonic order moves its army towards the village of Grunwald

• 15 July: Battle of Grunwald: In one of the biggest battle of the Middle Ages the Polish-Lithuanian army defeats the Teutonic order; One of the battle's victims is the order's Grand master Ulrich von Jungingen

• 25 July: Beginning of the unsuccessful Siege of Malbork, quasi capital of the Teutonic state, to which the entire order fled after the lost battle

• 7 August: The town of Toruń is handed over to king Jagiełło after a three-week siege

• 31 August: The town of Grudziądz with its important Teutonic fortress is conquered by the Polish army

• 19 September: Jagiełło withdraws from Malbork

• September: The army of Sigismund of Luxemburg invades Poland

• 29 September: Jagiełło passes through Toruń

• 31 October: Grudziądz reconquered by the Teutonic order; the same happens to the other fortresses won earlier by the Polish army

• Matthew of Cracov; Polish bishop and religious writer