In 1623 the Republic of the Seven United Netherlands, diplomatically supported by James I, King of England and of Ireland and as James IV King of Scotland, the brother-in-law of Christian IV of Denmark, started a new anti-Habsburg campaign. Thus the troops of the Catholic League were bound and the Prince-Archbishopric seemed relieved. But soon after the imperial troops under Albrecht von Wallenstein headed for the North in an attempt to destroy the fading Hanseatic League, in order to subject the Hanseatic cities of Bremen, Hamburg and Lübeck and to establish a Baltic trade monopoly, to be run by some imperial favourites including Spaniards and Poles. The idea was to win Sweden's and Denmark's support, both of which since long were after the destruction of the "Hanseatic League".