sentences:  That year, King Eadred harshly punished the northern defectors by launching a destructive raid on Northumbria, which notably included burning the Ripon minster founded by St Wilfrid.Although Eadred's forces had to sustain heavy losses in the Battle of Castleford ("Ceaster forda") – near Tanshelf – as they returned southwards, Eadred managed to check his rival by promising the latter's supporters even greater havoc if they did not desert Eric.The Northumbrians preferred to appease the English king, renounced Eric and paid compensation.