document.write("<table><tr><td><p>A system of defence for the northern frontier of France, devised by Vauban. There were two lines of fortresses stretching across the frontier, designed to slow an invading army by forcing it to undertake a number of sieges.</p></td></tr><tr><td><p><img src='http://www.fortified-places.com/glossary/images/precarre.jpg'></p></td></tr></table>");