The Battle of Werben was a battle of the Thirty Years' War, fought on July 22, 1631, between the Swedish Empire and the Holy Roman Empire. The Swedes had 16,000 soldiers and were led by Gustavus Adolphus, while the Imperialists had 23,000 soldiers and were led by Field-Marshal Count Tilly. Tilly's troops attacked Gustavus' entrenchments in front of Werben (Elbe), but Swedish batteries and the cavalry under Wolf Heinrich von Baudissin forced them to retreat. The attack was renewed a few days later with a similar result, and Tilly then drew off his forces, having suffered a loss of 6,000 men.