Page:The War with Mexico, Vol 2.djvu/168

150 But alterations in plan, a lack of implements, a shortage of materials, the general confusion and the want of time naturally made thoroughness impossible. Chapultepec was therefore a fort but not really a fortress. It stood alone, too, without the supporting positions that a fortress must have; and shot and shell could penetrate the defences of the college on the summit of the hill almost everywhere. Even the parapets were not

ready; and instead of the 2000 men required for an adequate garrison of the buildings and works, only a few hundreds occupied them. Their elevation merely hindered approach—not assault—and artillery could largely offset that advantage. To hold the grove was essential, for without it the garrison above could not obtain supplies or even water; and here the want of adequate defences had a still worse effect, since large forces could not be protected against artillery.