Organized June 6, 1863, from 3rd Louisiana Native Guard Infantry. Attached to 1st Division, 19th Army Corps, Dept. of the Gulf, to July, 1863. Port Hudson, La., to September, 1863. 1st Brigade, 1st Division, Corps de Afrique, Dept. of the Gulf, to April, 1864.
SERVICE.--Assault on Port Hudson, La., June 14, 1863. Surrender of Port Hudson July 9. Duty at Port Hudson until April, 1864. Skirmish at Jackson August 3, 1863. Designation of Regiment changed to 75th United States Colored Troops April 4, 1864.