The city of Danzig (Gdańsk) was captured by the State of the Teutonic Order on 13 November 1308, resulting in a massacre of its inhabitants and marking the beginning of tensions between Poland and the Teutonic Order. Originally the knights moved into the fortress as an ally of Poland against the Margraviate of Brandenburg. However, after disputes over the control of the city between the Order and the King of Poland arose, the knights murdered a number of citizens within the city and took it as their own. Thus the event is also known as Gdańsk massacre or Gdańsk slaughter. Though in the past a matter of debate among historians, a consensus has been established that many people were murdered and a considerable part of the town was destroyed in the context of the takeover.

Polish–Teutonic Wars refer to a series of conflicts that took place between the Kingdom of Poland and the Teutonic Order, a medieval German military order with roots in the Baltic region. These wars occurred primarily during the 14th and 15th centuries and were characterized by territorial disputes, political maneuvering, and religious differences.