Hill had only fourteen thousand British and Portuguese to repel the French marshal’s assault, but the ground he occupied was capable of being vigorously defended. On the right, General Byng’s brigade was formed in front of the Vieux Monguerre, occupying a ridge, with the Adour upon the right, and the left flanked by several mill dams. The brigades of Generals Barnes and Ashworth were posted on a range of heights opposite the village of St. Pierre, while two Portuguese brigades were formed in reserve immediately behind Ville Franque. The general form of the line nearly described a crescent, and against its concave side the efforts of the French marshal were principally directed. The position extended from the Adour to the Nive, occupying a space, from right to left, of four miles.
The outposts stationed on the road from Bayonne to St. Jean Pied de Port were driven back by the enemy’s tirailleurs, followed by the main body of the French, who mounted the sloping ground in front of the British position, and supported by another division, which moved by a hollow way between the left centre and Pringle’s brigade, they came forward in massive columns. Sir Rowland Hill at once perceived that Soult’s design was to force his centre, and carry the heights of St. Pierre. To strengthen that part of the position, the brigade of General Byng was promptly moved to the right of the centre, leaving the third (Buffs) regiment and some light companies at Vieux Monguerre, while a Portuguese brigade was marched from behind Ville Franque to support the left. The sixth division was apprised of the threatened attack, and an aide-de-camp was despatched to order its immediate march upon the centre.
The French came on with all the confidence of superior strength, and a full determination to break through the British position, and thus achieve upon the right that object which they had essayed upon the left, and twice in vain. Exposed to a tremendous fire of grape from the British guns, and a withering fusilade from the light infantry, they pressed steadily on, and, by strength of numbers, succeeded in gaining ground in front of the heights. But further they never could attain, as the supporting brigades joined on either flank, and every continued essay to force the centre was repulsed. A long and bloody combat, when renewed, produced no happier result, for the allies obstinately held their position. The Buffs and light companies, who had been forced by an overwhelming superiority to retire for a time from Vieux Monguerre, re-formed, charged into the village, and won it back at the point of the bayonet, when, after exhausting his whole strength in hopeless efforts to break the British line, Soult abandoned the attack, and reluctantly gave the order to fall back.
Not satisfied with repelling the enemy’s attack, Hill in turn became the assailant, and boldly pursued the broken columns as they retired from the front of the position. On a high ground in advance of his intrenched lines, Soult drew up in force, and determined to fall back no further. The hill was instantly assaulted by Byng’s brigade, led on by the general in person. Unchecked by a storm of grape and a heavy fire of musketry, the British, reinforced by a Portuguese brigade, carried the height, and the French were beaten from a strong position with a serious loss in men, and the capture of two pieces of cannon.
The third and sixth divisions came up as quickly as distance and difficult roads would permit, but the contest was ended; and Hill, unassisted by any supporting troops, had, with his own corps, achieved a complete and glorious victory.
This glorious battle was fought and won by Sir Rowland Hill with his own corps, alone and unassisted. Lord Wellington could not reach the field till the victory was achieved, and as he rode up to his successful general, he shook him heartily by the hand, with the frank remark, “Hill, the day’s your own.” He was exceedingly delighted with Sir Rowland’s calm and beautiful conduct of this action, and with the intrepid and resolute behaviour of the troops.
Every effort, continued with unabated vigour for five hours, and with decided advantages on his side, had signally failed, and the French commander was forced again to retire within his fortified lines between the Nive and the Adour, while the allies pushed their advanced posts to the verge of the valley immediately in front of St. Pierre.
In these continued actions the loss on both sides was immense. In the casualties of the 9th, 10th, 11th, 12th, and 13th of December, the total, including four generals, amounted to five thousand and sixty-one hors de combat.
The French loss was infinitely greater; it is but a moderate estimate to place it at six thousand men. Indeed, no contests, sanguinary as most of them had been during the Peninsular campaigns, were attended with greater loss of life, and those well accustomed to view a battlefield expressed astonishment at the slaughter the limited spaces on which the repeated struggles had occurred exhibited at the close of every succeeding engagement.
Soult, defeated in the presence of thousands of his countrymen, and with every advantage locality could confer, had no apology to offer for the failure of his attacks, and if any additional mortification were necessary, the defection of the regiments of Nassau-Usingen and Frankfort would have completed it.