 Wallenstein's forces were subsequently driven out of the Duchy of Pomerania, and Swedish forces had taken complete control of the duchy when Wallenstein's forces in Greifswald surrendered in June 1631.During the Swedish campaign, Alexander Leslie was succeeded as the governor of Stralsund by another Scot in Swedish service, James MacDougal, in 1630.From 1679 to 1697, the position was to pass to yet another Scot, Peter Maclean.