The Battle of Tuttlingen was fought in Tuttlingen on 24 November 1643. Those involved in the conflict were the French forces led by Marshal Josias Rantzau and the armies of the Holy Roman Empire and Spain led by Franz von Mercy. Technically, Mercy led a military force composed of Imperial, Spanish, Bavarian, and Lorrainer troops. Ultimately, Rantzau's forces were defeated by Mercy's surprise attack.