15th Infantry Regiment was organized during the spring of 1862 using the 1st (Speight's) Texas Infantry Battalion as its nucleus. Most of the men were recruited at Waco, Galveston, Milford, and Palestine. The unit was assigned to Randal's, King's, and J.E. Harrison's Brigade, Trans-Mississippi Department, and was involved in various conflicts in Louisiana. It reported 7 killed, 22 wounded, and 5 missing in the engagement at Bayou Bourbeau. Later it moved to Shreveport, then Hempstead, Texas, and in March, 1865, contained 20 officers and 301 men. The regiment disbanded in May. It was commanded by Colonels James E. Harrison, and J.W. Speight, and Lieutenant Colonel John W. Daniel.
