a double row of vortices in a fluid sometimes found in the wake of a cylindrical body (such as in a river, downstream of a bridge support), eddies being produced from alternate sides of the body
later Duke von Mecklenburg born Sept. 24, 1583, Hemanice, Bohemia died Feb. 25, 1634, Eger Austrian general. A noble of Bohemia, he served with the future Habsburg emperor Ferdinand II in the campaign against Venice in 1617. He remained loyal to Ferdinand when other Bohemian nobles revolted (1618-23) and was made governor of Bohemia and allowed to acquire vast holdings in confiscated estates. Created duke of Friedland (1625), he commanded the imperial armies in the Thirty Years' War. After successes in the war against Denmark (1625-29), he was awarded the principality of Sagan (1627) and the duchy of Mecklenburg (1629). Under pressure from the German princes, Ferdinand was forced to dismiss Wallenstein. Recalled to imperial command in 1631, he drove the Swedish army from Bavaria and Franconia but was defeated at the Battle of Lützen (1632). Believing he had the support of his generals, he mounted a revolt against the emperor (1634) and was assassinated
born Dec. 16, 1742, Rostock, Mecklenburg died Sept. 12, 1819, Krieblowitz, near Kanth, Silesia, Prussia Prussian military leader. He joined the Prussian army in 1760 and commanded troops against the French (1793-94) and in the Napoleonic Wars. In 1813 he came out of retirement to command Prussian troops against the French, defeating them at Wahlstatt and assisting in the allied victory at the Battle of Leipzig. In 1815 he again commanded Prussian forces in the Battle of Waterloo, coordinating his army with the allied forces under the duke of Wellington to bring about Napoleon's defeat