 In November 1627, the Duchy of Pomerania had capitulated to the forces of the Holy Roman Empire.Bogislaw XIV, Duke of Pomerania, on 10 November signed the Capitulation of Franzburg with Hans Georg von Arnim, who on behalf of Albrecht von Wallenstein commanded the imperial occupation forces in Pomerania.With the occupation, Wallenstein sought to secure the southern coastline of the Baltic Sea for Ferdinand II, Holy Roman Emperor against Christian IV of Denmark.