sentences:  Local nobles had to convert and give hostages, and only a few of them were granted privileges to retain their noble status.From 1274 to 1283 the Teutonic Knights conquered Skalvians, Nadruvians, and Sudovians/Yotvingians.After the Great Uprising, the Prussians rose a number of times against the Knights, but these uprisings were much smaller in scale and posed no real danger to the Teutonic Knights, who could concentrate on further conquests.