Dessau (Thirty Years' War).
Fought April 15, 1626, between the German Protestants under Count von Mansfeldt, and the Imperialists, about 20,000 strong, under Wallenstein. Mansfeldt was attacking the fort of Dessau, on the Elbe, when Wallenstein, approaching under cover of the woods, fell upon his flank, and totally routed him, killing or capturing nearly three-fourths of his army.