and the Piedad routes, the Niño Perdido causeway, coming from San Angel, connected with Niño Perdido garita, which stood at the edge of the city. Finally, a road leading nearly east from San Antonio gateway conducted one to La Viga garita and La Viga canal, a deep and broad waterway, which, since it could not well be bridged in the face of the enemy, practically bounded Scott's field of operations. There were thus four garitas — Belén, Niño Perdido, San Antonio and La Viga in this order from west to east — each guarding an approach to the capital from the south.[1]
Scott's expectation was to break the south front, and after the armistice ended, his engineers, assisted to some extent by himself and a Mexican officer in his pay, reconnoitred it actively and boldly except on the forenoon of the eighth. Had it been feasible to strike immediately on the resumption of hostilities, the enemy's lines would have been found poorly fortified and armed. But this could not well be done with Santa Anna's principal forces menacing our flank; the American army was not yet in position; and Scott desired first of all to destroy El Molino. After the battle of the eighth half of his troops imperatively required a breathing space. The wounded had to be given attention. The army still needed to be placed. It was necessary to protect hospitals, baggage and stores — especially since Governor Olaguíbel and about 700 militia, supposed by Americans to be Alvarez with his two divisions, were approaching the rear, and according to reports Valencia had 8000 men in that vicinity. Moreover Scott's information was not complete. The eighth of September, following the twentieth of August, had proved the danger of rashness; and the fresh losses made extreme caution absolutely necessary. Finally, Scott felt a suspicion that the Mexicans expected and wished him to attack their apparently unfinished works covering the south front.[2]
On the morning of the eleventh he inspected these once more, and then had a conference of generals and engineers at La Piedad. It was a solemn gathering. Before them lay the fortified capital of Mexico, a hopeful army of perhaps 15,000, a good equipment of artillery, nearly 700 trained gunners, and a large population, somewhat disillusioned, but excited and vengeful; and in view of the American situation it was essential,
