The remnants of the Choctaw battalion, were made a part of Spann's Battalion, an Alabama unit. I don't know if you recall this story:

Mississippi Choctaws were captured in Ponchatoula, Louisiana, and several died in a Union prison in New York.[1] Spann describes the incident, "[Maj. J.W. Pearce] established two camps—a recruiting camp in Newton County and a drill camp at Tangipahoa—just beyond the State boundary line in Louisiana in the fall of 1862. New Orleans at that time was in the hands of the Federal Gen. B.F. Butler. Without notice a reconnoitering party of the enemy raided the camp, and captured over two dozen Indians and several noncommissioned white officers and carried them to New Orleans. All the officers and several of the Indians escaped and returned to the Newton County camp; but all the balance of the captured Indians were carried to New York, and were daily paraded in the public parks as curiosities for the sport of sight-seers.[2]

1. Kidwell, Clara. "The Choctaws in Mississippi after 1830". Choctaws and Missionaries in Mississippi, 1818-1918. University of Oklahoma. p. 170

2. Spann, S. G.; Confederate Veteran Magazine Volume XIII, Number 12, pages 560 and 561 (December 1905). "Choctaw Indians As Confederate Soldiers"

Jim