French approach Bernardim Freire de Andrade commanded a Portuguese army that numbered about 25,000 men, according to
Charles Oman and 23,000 men according to Gaston Bodart.
Digby Smith stated that they had 18 guns. The better-armed troops were the 2nd Battalion of the Loyal Lusitanian Legion (700 men), part of the 9th
Viana Infantry Regiment, and the
Braga militia. There were also 15–20 cannons. The remainder of Freire's army consisted of about 23,000
ordenanza of whom 5,000 were equipped with firearms, 11,000 with pikes, and the rest with farm implements. This horde occupied a long position atop a ridge east of Braga. Freire blundered by keeping his force near Braga and only defending the mountain passes with outposts of fewer than 100 men. The only exception was the Salamonde position which Freire manned with 300 regular troops. Along Soult's route, the local
ordenanza and armed inhabitants defended themselves with suicidal bravery. A French officer wrote that if the Portuguese had capable leaders, the invaders would have had to retreat or be annihilated. Instead, individual homeowners and bands of villagers, including young women, would fight to the death. French stragglers were murdered and sometimes tortured to death. Nevertheless, the frantic resistance was futile and the divisions of Franceschi and Delaborde appeared in front of the main Portuguese defenses on 17 March. Meanwhile, Silveira found that Soult's corps was no longer in front of him, so he sent 3,000 troops to attack Merle's rearguard; this force was easily repulsed. While waiting for the rest of Soult's corps to arrive,
Maximilien Sébastien Foy's brigade seized a section of high ground that projected in front of the main Portuguese position. Foy's capture made an excellent artillery position.
Antonio de Castro, the Bishop of
Porto was a true Portuguese patriot. He had been appointed to the Portuguese Regency by
Hew Whitefoord Dalrymple, but rather than work with his colleagues in
Lisbon, he returned to Porto and assumed almost dictatorial powers. He called up large numbers of
ordenanza which he could neither arm properly nor keep under control. The British government sent
Baron Eben and
Friedrich von der Decken as military advisers.
Robert Wilson also arrived in Porto and organized the
Loyal Lusitanian Legion. However, Wilson soon deduced that the bishop wanted to use his new unit as a personal bodyguard. Therefore, Wilson and nearly 1,500 troops of the 1st Battalion marched to defend the frontier fortress of
Almeida, leaving Eben to take command of the 2nd Battalion. In the face of Soult's invasion, the bishop kept most of the troops to defend Porto. When Freire begged for help, the bishop only sent Eben and his battalion to Braga.
Action The Portuguese left flank and center held a plateau known as Monte Adaufé, with the left or western end protected by the
Cávado River. The main highway passed through the hamlet of Carvalho d'Este, went over Monte Adaufé, and ended at Braga. The village of
Ponte do Prado was behind the left flank on the Cávado. The Portuguese right flank defended Monte Vallongo, which was even higher than Monte Adaufé and overlooked the village of
Póvoa de Lanhoso. As Soult's professional troops approached, Freire became demoralized and began sending his army's heavy baggage and guns to the rear. Freire wished to retreat to Porto, but since his men were determined to fight, he decided not to do so. Instead, he had his motley troops dig fortifications near the place where the highway crossed Monte Adaufé. The
ordenanza who had fought at Salamonde came into camp, vocally accusing Freire of cowardice for not helping them. The soldiers became insubordinate and threatened to kill their leader. On 17 March, Freire panicked and sneaked away from his army, but he was caught by some
ordenanza and hauled back to camp as a prisoner. Eben harangued the soldiers, assumed command of the army, and had Freire confined in the Braga jail. Soon afterward, a group of
ordenanza went back to Braga, dragged Freire out of jail, and murdered him with their pikes. They also assassinated the army's chief of engineers and at least one officer on Frere's staff. The malefactors also jailed the chief magistrate of Braga and several other citizens who they suspected of treason. Eben seems to have tacitly approved of these outrages, but the soldiers were out of control and a threat to Eben as well. On 19 March, Eben pushed forward his right flank into
Lanhoso, but Mermet's division soon drove this force back to Monte Vallongo. The French captured about 20 Portuguese soldiers in this operation. Soult gave these captives copies of a proclamation offering a pardon for all soldiers who surrendered and sent them back under a flag of truce. As soon as the
ordenanza found the proclamations, these unfortunates were instantly murdered. By the morning on 20 March, all of Soult's corps was present except Merle's division. Oman estimated that the French had 13,000 infantry and 3,000 cavalry; Bodart gave the same totals, while Smith stated that the French had 16,650 men and 12 guns. Knowing that he faced an army of rabble, Soult decided to deliver a
frontal assault, believing that the enemy formation would collapse as soon as the French closed with it. Delaborde and Houssaye were ordered to assault the Portuguese center where the highway crossed Monte Adaufé. Mermet and Franceschi were detailed to attack the Portuguese right flank on Monte Vallongo. One of Heudelet's brigades would attack the Portuguese left flank, while the other brigade and Lorge's cavalry remained in reserve. The assault brigade was led by
Jean François Graindorge while the reserve brigade was under
Jean-Pierre Maransin. When the infantry of Delaborde and Heudelet advanced, the Portuguese set up a wild cheer and discharged a heavy fire, but this caused relatively few casualties. The Portuguese stayed firm as the French climbed the slope, but as their opponents reached the upper level of the plateau, the defenders began to flinch and scatter. Eben reported that the rout began when one of the Portuguese cannons burst when it was fired. Then Houssaye's cavalry charged into the Portuguese masses, led by the 17th
Dragoon Regiment. An officer of the 19th Dragoons wrote, "we made a great butchery of them", cutting down the Portuguese as they fled through the streets of Braga and a considerable distance beyond. Houssaye's dragoons captured guns, baggage, and the Portuguese military chest. Somehow, during the panic, some
ordenanza found time to murder the citizens locked up in the city jail. Heudelet's troops also stampeded their adversaries, but without cavalry to pursue, the Portuguese only lost 300 men on that part of the battlefield. Some defenders even rallied at Ponte do Prado and briefly held off the Hanoverian Legion in Heudelet's division. However, when the 26th Line Infantry Regiment came up, the Portuguese ran away again. The soldiers of Mermet and Franceschi had a longer climb to come to grips with the Portuguese right flank. By the time they reached the crest of Monte Vallongo, the rest of Eben's army was already running away. Resistance on this part of the battlefield was even weaker than on Monte Adaufé. Franceschi's horsemen charged into their fleeing enemies, killing great numbers of them. After being pursued about , a body of militia with four guns was cornered near the village of Falperra. Franceschi's cavalry prevented this force from escaping until the 31st Light Infantry Regiment arrived on the scene. The result was a massacre of the trapped Portuguese, half of whom were armed with pikes. An officer of the 31st Light wrote, "The commencement was a fight, the end a butchery". ==Results==