The observations which Cortes had made in his late tour of reconnoissance had determined him to begin the siege by distributing his forces into three separate camps, which he proposed to establish at the extremities of the principal causeways. By this arrangement the troops would be enabled to move in concert on the capital, and be in the best position to intercept its supplies from the surrounding country. The first of these points was Tacuba, commanding the fatal causeway of the _noche triste_. This was assigned to Pedro de Alvarado, with a force consisting, according to Cortés’ own statement, of thirty horse, one hundred and sixty-eight Spanish infantry, and five-and-twenty thousand Tlascalans. Cristóval de Olid had command of the second army, of much the same magnitude, which was to take up its position at Cojohuacan, the city, it will be remembered, overlooking the short causeway connected with that of Iztapalapan. Gonzalo de Sandoval had charge of the third division, of equal strength with each of the two preceding, but which was to draw its Indian levies from the forces assembled at Chalco. This officer was to march on Iztapalapan and complete the destruction of that city, begun by Cortés soon after his entrance into the Valley. It was too formidable a post to remain in the rear of the army. The general intended to support the attack with his brigantines, after which the subsequent movements of Sandoval would be determined by circumstances.[406] Having announced his intended dispositions to his officers, the Spanish commander called his troops together, and made one of those brief and stirring harangues with which he was wont on great occasions to kindle the hearts of his soldiery. “I have taken the last step,” he said; “I have brought you to the goal for which you have so long panted. A few days will place you before the gates of Mexico,--the capital from which you were driven with so much ignominy. But we now go forward under the smiles of Providence. Does any one doubt it? Let him but compare our present condition with that in which we found ourselves not twelve months since, when, broken and dispirited, we sought shelter within the walls of Tlascala; nay, with that in which we were but a few months since, when we took up our quarters in Tezcuco.[407] Since that time our strength has been nearly doubled. We are fighting the battles of the Faith, fighting for our honor, for riches, for revenge. I have brought you face to face with your foe. It is for you to do the rest.”[408] The address of the bold chief was answered by the thundering acclamations of his followers, who declared that every man would do his duty under such a leader; and they only asked to be led against the enemy.[409] Cortés then caused the regulations for the army, published at Tlascala, to be read again to the troops, with the assurance that they should be enforced to the letter.