The main obstacle to an advance being now removed, Sir Edward Pakenham divided the army into two columns. The right column, commanded by Major-General Gibbs, consisted of the 4th, 21st, 44th, and 1st West India Regiments; the left, under Major-General Keane, was composed of the 85th, 93rd, 95th, and 5th West India Regiments.

In the meantime the American general had occupied a position facing the British, with the Mississippi on his right, and an impenetrable morass on his left, covering New Orleans, and rendering an advance on that town impossible, until his position had been carried by a front attack. The ground thus occupied, about 1000 yards in breadth, had been fortified so as to be almost impregnable. Three deep parallel ditches had been dug across the whole front; in rear of these was a strong loop-holed palisade, and several batteries had been erected so as to bring a cross-fire to bear upon the level plain, across which the British would have to advance to the assault. The right flank of the enemy was further protected by a strong work thrown up on the right bank of the Mississippi, which effectually prevented our gun-boats turning the position, should they succeed in entering the river.

The night of December 26th was spent in continual alarms. Small bodies of American riflemen would creep down upon the pickets under cover of the darkness, and, firing upon the sentries, prevent the main body from obtaining any sleep. "Scarcely had the troops lain down, when they were aroused by sharp firing at the outposts, which lasted only till they were in order, and then ceased; but as soon as they had dispersed, and had once more addressed themselves to repose, the same cause of alarm returned, and they were again called to their ranks. Thus was the night spent in watching, or at best in broken and disturbed slumbers, than which nothing is more trying, both to the health and spirits of an army."

At daybreak on the 27th, the pickets were withdrawn, and the British formed in order of attack. The right column took post near the skirts of the morass, throwing out skirmishers half-way across the plain to meet the American riflemen, while the left column drew up upon the road. It was a clear, frosty morning, and in this formation the troops advanced, the enemy's skirmishers slowly falling back before them.

After an advance of about four miles the American position was sighted, and the British were saluted by a heavy cannonade from the batteries and shipping. "Scarce a ball passed over or fell short of its mark, but all striking full into the midst of our ranks, occasioned terrible havoc. The shrieks of the wounded, therefore, the crash of firelocks, and the fall of such as were killed, caused at first some little confusion; and what added to the panic was, that from the farm-houses beside which we stood bright flames suddenly burst forth. The Americans, expecting this attack, had filled them with combustibles for the purpose; and directing against them one or two guns, loaded with red-hot shot, in an instant set them on fire. The scene was altogether very sublime. A tremendous cannonade mowed down our ranks, and deafened us with its roar; whilst two large châteaux and their out-buildings almost scorched us with the flames, and blinded us with the smoke which they emitted."

The troops having formed line, advanced to storm the enemy's works. The right column, after a sharp and victorious skirmish with an advanced body of the enemy, arrived at the edge of the marsh, through which it endeavoured in vain to penetrate. At the same time the left column reached the first ditch, or canal, and, being unable to cross it, there halted, the men endeavouring to shelter themselves from the enemy's fire in a wet ditch about knee-deep. The troops being unable to close with the enemy, Sir Edward Pakenham ordered them to retire. This was effected by battalions, the last corps moving off about noon; and by nightfall the army was encamped about two miles from the former camping-ground, and the same distance from the enemy's position.

The 28th, 29th, and 30th, were occupied in bringing up guns from the fleet, on which duty the two West India Regiments and the seamen were employed. Major Weston and Lieutenant Magee, 1st West India Regiment, died from exposure and fatigue while engaged in this work.

During the night of the 31st, six batteries, mounting in all 30 pieces of heavy cannon, were completed, at a distance of some 300 yards from the American lines, and at dawn the artillery duel commenced. During the whole of the day a heavy cannonade continued, till, towards evening, the British ammunition began to fail, and the fire in consequence to slacken. The fire of the Americans, on the other hand, increased; and, landing a number of guns from their vessels, they soon compelled the British to abandon their works. The enemy made no attempt to secure the guns, and during the night they were removed.

Sir Edward Pakenham now decided to send a portion of his force across the river to attack the fort on the right bank and turn its guns upon the main position, whilst the remainder should at the same time make a general assault along the whole entrenchment. "But before this plan could be put into execution, it would be necessary to cut a canal across the entire neck of land from the Bayo de Catiline to the river, of sufficient depth and width to admit of boats being brought up from the lake. Upon this arduous undertaking were the troops immediately employed. Being divided into four companies, they laboured by turns, day and night.... The fatigue undergone during the prosecution of this attempt no words can sufficiently describe; yet it was pursued without repining, and at length, by unremitting exertions, they succeeded in effecting their purpose by the 6th of January."

On January 1st H.M.S. Vengeur arrived off the Chandeleur Islands with a convoy of transports, containing the 7th and 43rd Regiments, under Major-General Lambert, and these two battalions, each 800 strong, joined the army on the evening of January 6th. Next day the final arrangements were made. Colonel Thornton, with the 85th, the marines, and a body of seamen, in all 1400 men, were to cross the river immediately after dark, seize the batteries on the right bank, and at daylight commence firing on the enemy's line, which at the same moment was to be attacked by the remainder of the army. Major-General Keane, with the 95th, the light battalion, and the 1st and 5th[38] West India Regiments, was to attack the enemy's right, Major-General Gibbs, with the 4th, 21st, 44th, and 93rd, force the left, whilst Major-General Lambert was to hold the 7th and 43rd in reserve.