The reconquest of the Prince-Archbishopric – helped by forces from Sweden and from the city of Bremen – was interrupted by Leaguist forces under Gottfried Heinrich Graf zu Pappenheim, coming as a relief to Stade, where they joined the Catholic imperial and Leaguist forces still holding out. On May 10, 1632, they were granted safe-conduct and left a desperately impoverished city of Stade after its siege by "John Frederick's" forces. "John Frederick" was back in his office, only to realise the supremacy of Sweden, insisting on its supreme command until the war's end. The Prince-Archbishopric continuously suffered from billeting and alimenting soldiers. The relation between the Estates, who had to maintain administration under Catholic occupation, and the returned Administrator were difficult. The Estates preferred to directly negotiate with the occupants, this time the Swedes. "John Frederick" wanted to secularise the monasteries in favour of his budget, but the opposing Estates prevented that.