 Complete the following phrase:  The combat service of the regiment in 1864 began with skirmishing between 31 March and 15 April, attempting to delay the advance of the army of Union Major General Frederick Steele during the Red River Campaign. In his Camden Expedition, Steele attempted to advance from Little Rock to Shreveport, Louisiana. After 15 April the latter shifted his route and took Camden, and on 18 April the regiment fought in the Battle of Poison Spring, in which it participated in the defeat of Union troops and the capture of a large forage train. After Steele retreated from Camden, the regiment, with Marmadukes Brigade, pursued the Union forces and fought in the 