In April of 1864? Colonel Henry Gray was in charge of the 28th Louisiana Regiment.They were at Franklin at this time.
He was also at the battle of Mansfield and Pleasant Hill.
He was promoted Brig. General on April 15,1864.
I had 2 ancestors that were in this unit.
In 1863 the gunboat "Diana" was captured by portions of the Cresant and the 28th under the command of Col. Gray on Bayou Teche.
Battle of Irish Bend in April of 1863.
On December 1863 they were around Monroe.
In April 1864ol. Gray was promoted to Brig. Gen. to replace Gen.Mouton who died at the Battle of Mansfield.

Does this help?

Carolyn