This regiment was raised in October and November, 1862, and was made up of men enlisted in various portions of the state. Some of the companies went into camp at Davenport late in 1862, and others were not mustered in until March, 1863. It numbered over 1,100 men. The field officers were David S. Wilson, colonel; Samuel M. Pollock, lieutenant-colonel, and Thomas M. Shepherd, E. P. Ten Broeck and A. E. House, majors. It marched to Sioux City in March and April, and crossed over into Dakota territory to serve against the Indians. In June, they marched with General Sully's army on a campaign up the Missouri river to the mouth of the Little Cheyenne river, near which the battle of White Stone Hill was fought. The Sixth cavalry took an active part in it, losing twenty-two men. The Indians were driven from the field, 156 captured, and probably as many more killed and wounded. The march continued up through the bad lands, where several skirmishes took place with the retreating Indians, and the Yellowstone river was reached on the 12th of August. Colonel Wilson resigned in June, 1864, and Lieutenant-Colonel Pollock was promoted to the command of the regiment, which remained in the Indian country until September, 1865, when it returned to Sioux City, and was mustered out on the 17th of October.
SOURCE: Benjamin F. Gue, Biographies And Portraits Of The Progressive Men Of Iowa, Volume 1, p. 122-3