sentences:  Jutland had been reconquered by Denmark-Norway's allies, Poland and Brandenburg, and in 1659 Danish and forces liberated the Island of Funen in the Battle of Nyborg.As Baltic trade was vital to the Dutch economy they made clear to Charles they wouldn't allow Sweden to control the Sound.Charles X consented to reopen negotiations with Denmark, at the same time proposing to exercise pressure upon his rival by a simultaneous winter campaign in Norway.