The regiment capitulated at Ratekau following the defeat of 1806 and was disbanded. In 1807 it formed a squadron in its former depot as "Freikorps Marwitz" and amalgamated with Blücher's Corps to create the 1st Brandenburg Hussar Regiment on 7 September 1808 (Husaren Regiment Nr.3). The regiment's 2nd squadron served during the Russian Campaign of 1812 on the French side, and the regiment served throughout the 1813-1814 campaigns on the Coalition side, also participating in the 1815 campaign.