On 3 December, Hindman launched an offensive designed to crush Blunt's isolated 1st Division. However, Blunt's intelligence service alerted him at once and he called for reinforcements. Between 3 and 7 December, the 2nd and 3rd Divisions under Brigadier General Francis J. Herron made a remarkable forced march to Blunt's assistance, covering respectively. During the Battle of Prairie Grove, Battery E under Lieutenant Foust was attached to Colonel William W. Orme's 2nd Brigade in Herron's 3rd Division. The other units in the 2nd Brigade were the 19th Iowa and 94th Illinois Infantry Regiments, and the 8th Missouri Cavalry Regiment.