Complex sentence: These included the 4th, 11th, 21st, 23rd, and 43rd Alabama Infantry Regiments in addition to the 8th Alabama Cavalry, Company E of the Jeff Davis Legion, and Selden's Battery.
Split into simpler sentences: These included the 4th, 11th, 21st, 23rd, and 43rd Alabama Infantry Regiments. Also, the 8th Alabama Cavalry, Company E of the Jeff Davis Legion, and Selden's Battery.