General Van Dorn of the Trans-Mississippi Department issued Special Order #114, dtd June 15, 1862. It read, "As it is at present impracticable to organize a battalion of sharpshooters for each brigade as contemplated in General Order #34 from the War Department- each division Commander will designate one regiment from each brigade to act as sharpshooters. They will be particularly instructed and carry long range arms." In Phifer's brigade he first designated that the 6th Texas Calvary would train a company with one from the 9th Texas to make a Battalion. Later these two companies I of the 6th, and H of the 9th, were added to Ras Stirman's Arkansas Cavalry Battalion to make a Regiment of Sharpshooters. This unit trained as sharpshooters all summer 1862 and were deployed at Corinth as straight Infantry. I have found nothing to indicate they fought as skirmishers or sharpshooters. The unit broke up after Corinth.
It is likely that there were several battalions trained though only a few gained formal status.