 Complete the following phrase:  Upon the launch of the Union Armys Red River Campaign, seizing Alexandria, Louisiana and moving on Natchitoches and Shreveport, General Kirby Smith ordered Churchills Arkansas Division, which had most of his infantry including Tappans and Gauses brigades, south to Shreveport, Louisiana, in early March, 1864 to assist in countering Union General Nathaniel Banks advance along the Red River. Churchills division reached Keatchie, Louisiana, in time to support Richard Taylors main force, that routed Banks army in the Battle of Mansfield Sabine Crossroads on April 8, 1864. The division arrived during the engagement, but was not committed to battle and occupied a position on the flank of General Taylors division. Brigadier General Churchill was placed in command of both his own division and Brigadier General Parsons Division during the pursuit of the enemy from Mansfield to Pleasant Hill, Louisiana, so Brigadier General Tappan assumed command of Churchills Division. While Tappan commanded the Division, Colonel Grinstead assumed command of Tappans Brigade and led it through the fight at 