After the military defeat of Prussia by France, the Prince of Orange subsequently lost his remaining possessions (including the mediated ones). Fulda was occupied by the French troops on 27 October 1806. It remained under French rule until 19 May 1810, when it was incorporated into the Grand Duchy of Frankfurt. Subsequently, Corvey was incorporated into the Kingdom of Westphalia on 7 December 1807 and Dortmund into the Grand Duchy of Berg on 1 March 1808.