After the death of Colonel Allen, the command devolved upon Captain Jefferson Hunt, of Company "A." The promise had been made to President Young, by Colonel Allen, that no officers would be chosen for the battalion, except himself, outside of their ranks. On what authority the promise was made, does not appear. However, shortly afterwards Lieutenant A. J. Smith, of the regular army, was given command, contrary to the wishes of the men. With Lieutenant Smith there came Dr. George B. Sanderson, whom Colonel Allen had appointed to serve with the battalion as surgeon. According to the journals of the men, they were caused to suffer considerably because of the "arrogance, inefficiency and petty oppressions" of these two officers. Sanderson was from Missouri, and perhaps was none too friendly towards the troops; however, the enforcement of discipline, to which they were not accustomed, may have magnified the ill-treatment in their eyes to some extent. The heat of the summer was excessive, their rations were reduced, and through the drinking of brackish water, many were taken with malaria. They had already become weakened from their long marches across the plains of Iowa, in inclement weather, without proper food and shelter, so that they were more susceptible to disease. Dr. Sanderson prescribed calomel and arsenic, refusing to permit the men to resort to their own simple remedies, and evincing skepticism in the laying on of hands and their exercise of faith. The Line of March Their line of march from Fort Leavenworth had taken them across the Kansas River and then westward to the Arkansas, which they followed upstream for about one hundred miles. From that point they journeyed southwest to the Cimarron River and passed near what is now the junction of the states of Kansas, Colorado and Oklahoma, on a southwesterly course to the old Spanish town of Santa Fe. From Santa Fe their route was by way of the Rio Grande, southward near the present city of El Paso, and thence to the west, through the city of Tucson--which was deserted by its garrison as the battalion approached--across the Gila and Colorado to San Diego. The Families Ordered to Pueblo As the battalion was leaving the Arkansas River, the commanding officer gave orders that a number of families which had accompanied the troops to that point, should be detached and sent to Pueblo, a Mexican town situated at the eastern base of the Rocky Mountains. There was some protest because it was contrary to a promise given at the beginning of the march; but it was really a necessary action. For the families of members of the battalion to travel with the companies was a hindrance to the rapid progress they were called upon to make. Captain Nelson Higgins and a guard of ten men were detailed to make the journey to Pueblo. They departed September 16, 1846, and on the way one of their number, Norman Sharp, was accidentally killed. Colonel Cooke Takes Command