sentences:  However, this treaty was never honored or enforced, especially after the Prussian victory in the Battle of Krücken at the end of 1249.The second uprising, known in historiography as "The Great Prussian Uprising", was prompted by the 1260 Battle of Durbe, the largest defeat suffered by the Teutonic Knights in the 13th century.This uprising was the longest, largest, and most threatening to the Teutonic Order, who again were reduced to five of their strongest castles.