After his defeat at Nivelles, Marshal Soult fell back to a defensive line south of the town of Bayonne along the Adour and Nive rivers.
Despite poor weather, Hill led five Anglo-Portuguese divisions (2nd (including the 29th Regiment), 3rd, 6th (including the 36th Regiment), Portuguese and Pablo Morillo’s Spanish Divisions) across to the east bank of the Nive near Ustaritz on 9 December. Meanwhile, the remainder of the British force under Hope launched diversionary attacks towards Bayonne on the west bank of the Nive.
Soult launched a counter-attack with eight divisions against Hope the following day, and despite several fierce actions the British line held until reinforced.
The right flank of Hope’s line was held by the 7th Division at the bridge of Urdains. The Light Division defended the centre near Bassussary. The left was held by Bradford and Campbell’s independent Portuguese brigades north of Barroilhet. The terrain forced the French into these three corridors of attack. The 5th Division lay three miles to the rear while the 1st Division were ten miles away.
Soult committed five divisions against Bassussary and three divisions against Barroilhet. The four divisions leading the attack were fresh while the supporting troops were tired from skirmishing with Hill’s troops.
The French advance soon came upon the ridge of Arcangues, topped by a chateau and a church. After one attack was beaten off with ease by the Light Division, the French settled down to a futile artillery bombardment and probing attacks against the very strongly built structures.
The picket line on Hope’s left flank was overrun by the French attack and 200 men captured. The Portuguese held onto Barroilhet and awaited reinforcements. The 5th Division arrived, but due to a staff blunder, was low on ammunition.
Soult sent two divisions to assist this attack. After hours of heavy fighting, he ordered one last charge. This attack drove to the mayor’s house of Barroilhet, the French skirmishers wounding and nearly capturing Hope. At this point, the 1st Division came up and Soult called off his attacks. Both sides had lost around 1,600 troops.
Battle of St. Pierre
On the night of 12 December, a temporary pontoon bridge over the Nive at Villefranque was washed away. This isolated Hill’s 14,000 men and 10 guns on the east bank of the river, just as the French were reorganizing for an assault.
Seizing his opportunity, Soult rapidly switched six divisions and 22 guns to the east bank of the Nive and attacked Hill. Soult outnumbered Hill’s corps by three-to-one. Defending a line between Petit Mougerre and the Nive, the Allied corps held on for hours in a bitter fight. The capable Hill performed superbly, feeding in his few reserves with skill and exhorting his troops.
However, after the arrival of reinforcements under Wellington, the French troops refused to continue the attack. Soult reluctantly retreated into Bayonne, having lost 3,000 men against Anglo-Portuguese losses of 1,750. The Allied army commander rode up to his subordinate and congratulated him, “Hill, the day’s your own.”
As a result of their courage on this day both the 29th and 36th Regiments were accorded the battle Honour NIVE.