More history of Miles' Legion can be found at http://www.acadiansingray.com/Miles%20Leg.%20(32nd%20Regt.%20Inf.).htm
"The formal organization of the legion occurred at Camp Moore on May 16 or 17, 1862, but the infantry companies had all been in service for several months. The unit always used the name Milesí Legion; it never went by the designation 32nd Regiment. On June 1, the legion left for Grand Gulf, Mississippi. A portion of it fought in a skirmish near there on June 24. The legion received orders in late August to report for duty at Port Hudson. There the men did picket and guard duty and assisted in the construction of earthwork defenses. A small group of volunteers from the legion sailed on the cottonclad Dr. Beatty and on February 24 participated in the capture of the Federal ironclad Indianola near New Carthage on the Mississippi River. From April 29 to May 3, the legion took part in the unsuccessful efforts to stop Colonel Benjamin Griersonís Federal cavalry raiders from reaching Baton Rouge. The legion played an important role in the battle of Plains Store, May 21. In this battle, the first significant engagement for the unit, 89 of its men were killed, wounded, or missing. During the Siege of Port Hudson, May 23-July 9, the legion held most of the trenches on the Confederate right wing and repulsed all attacks thrown against it. Around 150 men of the unit deserted and went into Union lines as the siege dragged on. At the end of the siege, the enlisted men went home on parole and the officers went into Federal prisons. In early 1864, the men on the east side of the Mississippi River were reorganized, mounted, and assigned to Goberís Regiment Mounted Infantry. Large numbers of the men west of the Mississippi River, particularly those who had been conscripted, remained at their homes rather than returning to service when declared exchanged in the fall of 1863. A small number of men gathered in camp at Alexandria in the summer of 1864 and, with some new recruits, were reorganized as the 15th Louisiana Battalion Sharpshooters."