document.write("<table><tr><td><p>Baron Menno van Coehoorn (1641-1704) is sometimes called the 'Dutch Vauban', a title well-earned in a long career as a military engineer. He fortified many places in the low countries, making much use of flooded ditches and inundations. At the siege of Grave in 1673 he used a mortar of his own invention to great effect. These types of mortars are still in use, and still known as <i>coehorn mortars</i>.</p></td></tr></table>");