Complex sentence: It encamped at Carrollton, reporting to Brigadier General Emory, and attached to the Third Brigade, Third Division; and was employed six weeks in improving the drill and discipline of the regiment.
Split into simpler sentences: It encamped at Carrollton, reporting to Brigadier General Emory, and attached to the Third Brigade, Third Division. It was employed for six weeks in improving the drill and discipline of the regiment.