In December, Sheridan was appointed chief commissary officer of the Army of Southwest Missouri, but convinced the department commander, Halleck, to give him the position of quartermaster general as well. In January 1862, he reported for duty to Maj. Gen. Samuel Curtis and served under him at the Battle of Pea Ridge. Sheridan soon discovered that officers were engaged in profiteering. They stole horses from civilians and demanded payment from Sheridan. He refused to pay for the stolen property and confiscated the horses for the use of Curtis's army. When Curtis ordered him to pay the officers, Sheridan brusquely retorted, "No authority can compel me to jayhawk or steal." Curtis had Sheridan arrested for insubordination but Halleck's influence appears to have ended any formal proceedings. Sheridan performed aptly in his role under Curtis and, now returned to Halleck's headquarters, he accompanied the army on the Siege of Corinth and served as an assistant to the department's topographical engineer, but also made the acquaintance of Brig. Gen. William T. Sherman, who offered him the colonelcy of an Ohio infantry regiment. This appointment fell through, but Sheridan was subsequently aided by friends (including future Secretary of War Russell A. Alger), who petitioned Michigan Governor Austin Blair on his behalf. Sheridan was appointed colonel of the 2nd Michigan Cavalry on May 27, 1862, despite having no experience in the mounted arm.