Events of the year 1410 in Poland.
Incumbents Monarch: Władysław II Jagiełło
Events 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
Deaths Matthew of Cracov; Polish bishop and religious writer
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