What battle and at what time do you refer, I have him present on his regiment's muster roll for the months of March/April 1863. No further records are in his file.

George Martin

Jospeph Austin enlisted March 5, 1862 at New Orleans for ninety days subsequently consolidated with the 16th Battalion Louisiana Infantry, also known as Confederate Guards Response Battalin and the 11th Battalion Louisiana Infantry [also known as 24th Regiment Infantry]

Private Joseph Austin, Co. E, 11th Battalion Louisiana Troops, enlisted May 14, 1862 at Many, Louisiana, age 29, last recorded present on the Mardh/April 1863 muster