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Rh division was selected to go forward to secure this result. The division marched to Perote on the great plain, not far from where the road debouches from the mountains. There is a low, strong fort on the plain in front of the town, known as the Castle of Perote. This, however, offered no resistance and fell into our hands, with its armament.

General Scott having now only nine or ten thousand men west of Vera Cruz, and the time of some four thousand of them being about to expire, a long delay was the consequence. The troops were in a healthy climate, and where they could subsist for an indefinite period even if their line back to Vera Cruz should be cut off. It being ascertained that the men whose time would expire before the City of Mexico could possibly fall into the hands of the American army, would not remain beyond the term for which they had volunteered, the commanding-general determined to discharge them at once, for a delay until the expiration of their time would have compelled them to pass through Vera Cruz during the season of the vomito. This reduced Scott′s force in the field to about five thousand men.

Early in May, Worth, with his division, left Perote and marched on to Puebla. The roads were wide and the country open except through one pass in a spur of mountains coming up from the south, through which the road runs. Notwithstanding this the small