sentences:  This army broke the Siege of Königsberg but as soon as the army returned home, the Sambians resumed the siege and were reinforced by Herkus Monte and his Natangians.Herkus was later injured and the Natangians retreated, leaving the Sambians unable to stop supplies reaching the castle and the siege eventually failed.Prussians were more successful capturing castles deeper into the Prussian territory (with an exception of Wehlau, now Znamensk), and the Knights were left only with strongholds in Balga, Elbing, Culm, Thorn, and Königsberg.