We passed Port Hudson, scene of two of the most terrific episodes of the war—the night-battle there between Farragut's fleet and the Confederate land batteries, April 14th, 1863; and the memorable land battle, two months later, which lasted eight hours—eight hours of exceptionally fierce and stubborn fighting—and ended, finally, in the repulse of the Union forces with great slaughter. [LOTM p414-5]

From Wikipedia:
 

In 1833, one of the first railroads in the United States was built from Port Hudson to Clinton. Clinton was the entrepôt for the produce of much of the region, which, sent by rail, was transferred to steamboats at Port Hudson. Old Port Hudson was incorporated as a town in 1838.

During the American Civil War, the area was the scene of bitter fighting as the Confederacy and Union struggled over control of the Mississippi River (see Siege of Port Hudson). Location of the tracks and the old town can be seen at the bend of the Mississippi River (view 1864 map). The rails and crossties of the track were removed before 1920.

What were then called the 1st and 3rd Regiments of the Louisiana Native Guards (later re-formed as regiments of the United States Colored Troops) proved themselves in battle on the Union side; they were the first black troops to have some black officers. A minority of men in the regiments were free men of color, who had been educated before the war; most of the soldiers were African-American slaves who had escaped to Union lines to gain freedom and support the war.

Port Hudson National Cemetery was established in the area, first as a place of burial of Union dead. [12]