History of the Nineteenth Army Corps

by Richard B. Irwin

By the end of March all the troops destined for the expedition had landed at Ship Island, with the exception of the 13th Connecticut, 15th Maine, 7th and 8th Vermont regiments, 1st Vermont and 2d Massachusetts batteries. Within the next fortnight all these troops joined the force except the 2d Massachusetts battery, which being detained more than seven weeks at Fortress Monroe, and being nearly five weeks at sea, did not reach New Orleans until the 21st of May. Meanwhile, of the six Maine batteries, all except the 1st had been diverted to other fields of service.

While awaiting at Ship Island the completion of the preparations of the navy for the final attempt on the river forts, Butler proceeded to organize his command and to discipline and drill the troops composing it. Many of these were entirely without instruction in any of the details of service. On the 22d of March, he divided his forces into three brigades of five or six regiments each, attaching to each brigade one or more batteries of artillery and a troop of cavalry. These brigades were commanded by Brigadier-Generals John W. Phelps and Thomas Williams, and Colonel George F. Shepley of the 12th Maine. When finally assembled the whole force reported about 13,500 officers and men for duty, and from that moment its strength was destined to undergo a steady diminution by the natural attrition of service, augmented, in this case, by climatic influences.

The fleet under Farragut consisted of seventeen vessels, mounting 154 guns. Four were screw-sloops, one a side-wheel steamer, three screw corvettes, and nine screw gunboats. Each of the gunboats carried one 11-inch smooth-bore gun, and one 30-pounder rifle; but neither of these could be used to fire at an enemy directly ahead, and, in the operations awaiting the fleet, it is within bounds to say that not more than one gun in four could be brought to bear at any given moment. With this fleet were twenty mortar-boats, under Porter, each carrying one 13-inch mortar, and six gunboats, assigned for the service of the mortar-boats and armed like the gunboats of the river fleet. Farragut, with the Hartford, had reached Ship Island on the 20th of February; the rest of the vessels assigned to his fleet soon followed. Then entering the delta, from that time he conducted the blockade of the river from the head of the passes.

The Confederacy was now being so closely pressed in every quarter as to make it impossible, with the forces at its command, to defend effectively and at the same moment every point menaced by the troops and fleets of the Union. Thus the force that might otherwise have been employed in defending New Orleans was, under the pressure of the emergency, so heavily drawn from to strengthen the army at Corinth, then engaged in resisting the southward advance of the combined armies of the Union under Halleck, as to leave New Orleans, and indeed all Louisiana, at the mercy of any enemy that should succeed in passing the river forts. At this time the entire land-force, under Major-General Mansfield Lovell, hardly exceeded 5,000 men. Of these, 1,100 occupied Forts Jackson and St. Philip, under the command of General Duncan; 1,200 held the Chalmette line, under General Martin L. Smith, and about 3,000, chiefly new levies, badly armed, were in New Orleans. Besides this small land-force, the floating defences consisted of four improvised vessels of the Confederate navy, two belonging to the State of Louisiana, and six others of what was called the Montgomery fleet. These were boats specially constructed for the defence of the river, but most of them had been sent up the river to Memphis to hold off Foote and Davis. The twelve vessels carried in all thirty-eight guns. Each of the boats of the river-fleet defence had its bows shod with iron and its engines protected with cotton. This was also the case with the two sea-going steamers belonging to the State. Of this flotilla the most powerful was the iron-clad Louisiana, whose armor was found strong enough to turn an 11-inch shell at short range, and, as her armament consisted of two 7-inch rifles, three 9-inch shell guns, four 18-inch shell guns, and seven 6-inch rifles, she might have proved a formidable foe had her engines been equal to their work.

At the Plaquemine Bend, twenty miles above the head of the passes and ninety below New Orleans, the engineers of the United States had constructed two permanent fortifications, designed to defend the entrance of the river against the foreign enemies of the Union. These formidable works had now to be passed or taken before New Orleans could be occupied. Fort St. Philip, on the left or north bank, was a work of brick and earth, flanked on either hand by a water battery. In the main work were mounted, in barbette, four 8-inch columbiads and one 24-pounder gun; the upper water battery carried sixteen 24-pounders, the lower one one 8-inch columbiad, one 7-inch rifle, six 42-pounders, nine 32-pounders, and four 24-pounders. Besides these, there were seven mortars, one of 13-inch calibre, five of 10-inch, and one of 8-inch. Forty-two of the guns could be brought to bear upon the fleet ascending the river.

Fort Jackson, on the south or left bank of the river, was a casemated pentagon of brick, mounting in the casemates fourteen 24-pounder guns, and ten 24-pounder howitzers, and in barbette in the upper tier two 10-inch columbiads, three 8-inch columbiads, one 7-inch rifle, six 42-pounders, fifteen 32-pounders, and eleven 24-pounders, in all sixty-two guns. The water battery below the main work was armed with one 10-inch columbiad, two 8-inch columbiads, and two rifled 32-pounders. Fifty of these pieces were available against the fleet, but of the whole armament of one hundred and nine guns, fifty-six were old 24-pounder smooth-bores.

The passage of the forts had been obstructed by a raft or chain anchored between them. The forts once overcome, no other defence remained to be encountered until English Turn was reached, where earthworks had been thrown up on both banks. Here at Chalmette, on the left bank, it was that, in 1815, Jackson, with his handful of raw levies, so signally defeated Wellington's veterans of the Peninsula, under the leadership of the fearless Pakenham.

Fort St. Philip stands about 700 yards higher up the river than Fort Jackson; the river at this point is about 800 yards wide, and the distance between the nearest salients of the main works is about 1,000 yards. A vessel attempting to run the gauntlet of the batteries would be under fire while passing over a distance of three and a half miles. The river was now high, and the banks, everywhere below the river level, and only protected from inundation by the levees, were overflowed. There was no standing room for an investing army; the lower guns were under water, and in the very forts the platforms were awash.

When the fleet was ready, Butler embarked eight regiments and three batteries under Phelps and Williams on transports, and, going to the head of the passes, held his troops in readiness to co-operate with the navy. On the 16th of April the fleet took up its position. The mortar-boats, or "bombers," as they began to be called, were anchored between 3,000 and 4,000 yards below Fort Jackson, upon which the attack was mainly to be directed. From the view of those in the fort, the boats that lay under the right bank were covered by trees. Those on the opposite side of the river were screened, after a fashion, by covering their hulls with reeds and willows, cut for the purpose.

On the 18th of April the bombardment began. It soon became evident that success was not to be attained in this way, and Farragut determined upon passing the forts with his fleet. Should he fail in reducing them by this movement, Butler was to land in the rear of Fort St. Philip, near Quarantine, and carry the works by storm. Accordingly, he remained with his transports below the forts, and waited for the hour. Shepley occupied Ship Island with the rest of the force.