given for the refusal to those previously expressed by Peña y Peña. In consequence of this final rejection of the offer to negotiate, Mr. Slidell requested the necessary passports, and, in a few days, set out on his return to the United States.[1] The Mexican government immediately commenced making preparations for war. Loans were obtained, arms and supplies provided for the army, and its numerical force augmented; and on the 4th of April, positive orders were issued to the officers commanding on the northern frontier, to attack the American troops.
The march of the American army from Corpus Christi, was not obstructed by the Mexicans. Small armed parties were occasionally seen in the distance, who disappeared on the approach of the advancing columns of General Taylor's force. For a few miles from their late encampment, the roads were found to be in good order; but further in the interior, the country presented a more unfavorable appearance. It was for the most part unbroken, but either low and marshy, or dry and sandy, with here and there a stretch of prairie land, covered with thick matted grass, and dotted at intervals with muskeet bushes, and clumps of chaparral. The route was toilsome and fatiguing, yet the soldiers bore every hardship without a murmur or complaint.[2] On the 19th of March, the advanced corps halted within three miles of the Arroyo Colorado, in order to effect a concentration of the force preparatory to crossing the stream, the passage of which, it was thought, might be
