to support General Taylor's operations against General's Grant's forces laying siege to Vicksburg Mississippi. The 33rd spent the month of July 1863 in the vicinity of Delhi, Louisiana, where they conducted raids on Federal interests between Delhi and the Mississippi River. Tappan's Brigade was present at the Battle of Goodrich's Landing on June 29, 1863, where they helped force the capitulation of two companies of the 1st Arkansas Infantry, African Descent. Tappan's Brigade and the 33rd Arkansas missed the Battle of Helena on July 4, 1863, because of its operations in Louisiana. Tappan's brigade was ordered to return to Arkansas, via Pine Bluff, in August 1863. Tappan's Brigade and the 33rd returned to Arkansas in August 1863, and participated in the defense of Little Rock. When Little Rock fell on September 10, 1863, the regiment withdrew to southern Arkansas and went into winter quarters in Hempstead County. Red River Campaign In the Spring of 1864, Churchill's Division, including Tappan's Brigade moved south to oppose Union General Nathaniel Banks' Red River Campaign in north-central Louisiana in March and early April 1864. The division arrived during the Battle of Mansfield on April 8, 1864, but was not committed to the battle and occupied a position on the flank of General Taylor's division. Brigadier General Churchill was placed in command of both his own division and Brigadier General Parson's Division during the pursuit of the enemy from Mansfield to Pleasant Hill, Louisiana, so Brigadier General Tappan assumed command of Churchill's Division. While Tappan commanded the Division, Colonel Grinsted assumed command of Tappan's Brigade and led it through the fight at Pleasant Hill, on April 9, 1864. General Tappan described the action at Pleasant Hill as follows: Churchill's Division marched back north into Arkansas to deal with the other part of the Federal advance, General Frederick Steele's Camden Expedition. The division arrived after a long forced march at Woodlawn, Arkansas, on April 26, where they rested overnight, then joined the pursuit of Steele's retreating army, catching it trying to cross the Saline River near Jenkins' Ferry. The regimental commander, Colonel Hiram Lane Grinsted, was killed in action at Jenkins' Ferry. The regiment sustained 92 men killed and wounded in the fight at Jenkins' Ferry. The regiment was engaged in the following battles: Battle of Prairie Grove, Arkansas, December 7, 1862. Battle of Little Rock, Arkansas, September 10, 1863. Red River Campaign, Arkansas March–May, 1864.