Port Hudson

Fought between May 22 and July 9, 1863, the siege of Port Hudson marked the closing chapter of the Union effort to wrest control of the Mississippi River from Confederate hands. At the same time Grant pressed his siege against Vicksburg further upstream, General Nathaniel Banks received orders to seize the Confederate stronghold at Port Hudson, Louisiana, before marching to reinforce Grant's operation. Banks first tried a direct assault, but when it collapsed he shifted to a prolonged siege lasting 48 days, the longest one American military forces had yet endured. A follow-up attack fared no better, and Confederate General Franklin Gardner did not surrender the garrison until word arrived that Vicksburg had already fallen. With Port Hudson's capture, Union forces secured command of the Mississippi, opening navigation along its entire length from the Gulf of Mexico up through the Deep South and beyond.

Background

Control of the Mississippi River became a central strategic goal for both sides as soon as fighting broke out in April 1861. Confederate forces needed the waterway to keep supplies moving, while the Union hoped that seizing it would sever the Confederacy in two. Especially valuable to the South was the section of river near the Red River's mouth, since the Red served as the main artery for exchanging goods between east and west: salt, cattle, and horses came downstream from the Trans-Mississippi region, while soldiers and munitions traveled the opposite direction from the east.

By the spring and early summer of 1862, Union forces were pressing down on the river from both directions. Flag Officer David G. Farragut led a fleet that forced its way past Confederate defenses at Forts Jackson and St. Philip, leading to the capture of New Orleans. Meanwhile, Charles H. Davis brought another Union fleet to occupy Memphis after crushing Confederate naval forces there. In response, the Confederacy dug in at Vicksburg and Port Hudson to hold onto the river's middle stretch.

The notion of fortifying the bluffs at Port Hudson originated with General Pierre G.T. Beauregard, commander of the Army of the Mississippi, known for his skill with fixed defenses. Writing to Major General Mansfield Lovell in March 1862, he urged that Port Hudson be fortified as insurance against the possible collapse of Confederate defenses above Memphis. That June, Major General Earl Van Dorn told Jefferson Davis plainly that he wanted Baton Rouge and Port Hudson secured. Shortly after Baton Rouge fell to Union forces, General John C. Breckinridge, leading 4,000 men, acted on Van Dorn's wishes by occupying Port Hudson, a location between Baton Rouge and Bayou Sara, using troops under General Daniel Ruggles. The 4th Louisiana Infantry reached the site on August 15, 1862.

Historian John D. Winters noted that Port Hudson, unlike Baton Rouge, ranked among the river's strongest positions, since guns placed on its bluffs could dominate the entire waterfront. Its situation compared to that of Quebec City above the St. Lawrence during the French and Indian War.

The political drive behind the Union push toward Port Hudson traced back to the November 1862 elections, when Republican strongholds in Ohio, Indiana, and Illinois suffered unsettling Democratic gains. Indiana's governor, Oliver P. Morton, wrote urgently to Lincoln warning that the fate of the Northwest hung in the balance, meaning that unless Union control of the whole Mississippi restored free trade for states along the Ohio River, the Union itself might fracture further. Morton feared Ohio, Indiana, and Illinois could break from the Northeast toward the more economically appealing Confederacy, especially since the southern portions of these states had been settled by transplants from the South who still identified culturally with that region.

Alarmed by this political danger, the Lincoln administration acted swiftly. Major General Nathaniel Banks was pulled from a planned Texas expedition and handed Benjamin Butler's post as commander of the Department of the Gulf. Henry Wager Halleck, in overall command of Union armies, relayed Lincoln's view that reopening the Mississippi stood as the single most urgent military and naval priority, urging Banks to move without delay. Banks and his expedition departed for New Orleans on December 4, 1862.

By May 1863, Union land and naval forces launched a joint campaign meant to secure the entire Mississippi. Grant moved against Vicksburg in the north while Banks simultaneously struck at Port Hudson in the south, the two remaining Confederate strongholds on the river.

Port Hudson itself sat atop an 80-foot bluff on the river's eastern bank, overlooking a sharp bend in the Mississippi some 25 miles above Baton Rouge. The surrounding terrain was brutal, a tangle of steep ravines, swamps, and cane thickets that formed a natural stronghold. Though it served as a shipping point for cotton and sugar moving downriver, the town itself held only a handful of buildings and about 200 residents when the war began. Because the river had shifted southward, the docks had likewise moved roughly half a mile south.

In 1862 a rail line was built connecting Port Hudson to Clinton, 19 miles northeast, stretching 21 miles in total. It failed to link up with the New Or

Aftermath

The fall of Port Hudson, coming alongside the capitulation of Vicksburg, delivered the entire Mississippi River and its principal tributaries into Union hands, cutting off the eastern Confederate states from those in the west.

Losses on both sides were substantial. Union casualties ranged from 4,700 to 5,200, with another 4,