I have done extensive research on the battle fought in the Jonesville/Harrisonburg area. The second battle was not fought at Ft. Beauregard, but took place just south of H'burg at the Indian Mound near the mouth of Brushley (pronounced Bursley) Bayou. It was fought between Confederate Infantry supported by two 30lbs. Parrot rifles commanded by a Lt. Gaudet. and a Union Ironclad and five Timberclads. They Union boats came up the Ouachita River the day after having a minor skirmish at Jonesville (Trinity). After a furious exchange of fire the river bend/Bushley Bayou/Indian mound site, the gunboats proceeded on past H'burg traveling north on the river but where stopped at the Catahoula Sholes a few hours later. The water elevation in the Ouachita was falling rapidly and the expedition decided to turn around and head back south toward the Red River. They stopped at H'burg and set fire to some of the buildings, then reboarded and returned to Jonesville, La., for the night after burying four Union sailors on the bank of the Ouachita. All this information and much more is available from the Official Records of the WBTS. However, I got mine from a compilation of the reports in an unpublished article at the Franklin Parish Library.