sentences:  Most castles fell in 1262–1263, and Bartenstein fell in 1264.The Prussians destroyed captured forts instead of using them for their own defence, so the end of successful sieges meant that large Prussian forces did not have to stay near their home and were then free to operate in other parts of Prussia, raiding the Culmerland and Kuyavia.A recovered Herkus Monte raided Culmerland with a large force and took many prisoners in 1263.