[1] Marshal Heinrich Botel gathered men from Kulm, Elbing, and Balga for an expeditionary attack deeper into Prussia.

The Prussian army was growing as fresh troops arrived from more distant territories, and the Order did not have enough supplies to withstand a siege.

[3] Therefore, the Teutonic Order negotiated a surrender: the marshal and three other knights were to remain as hostages while the others were to lay down their weapons.

[4][non-primary source needed] The Natangians broke the agreement and massacred 54 knights and a number of their followers.

Such barbarity gave the Teutonic Order an excuse not to treat the Prussians as civilized and honorable people.