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The Napoleon Series > Military Information > Virtual Battlefields

The Siege of Almeida, Portugal: 24 July - 28 August 1810

By Robert Burnham, FINS

Two fortresses, guarded the Portuguese border with Spain: Elvas in the south and Almeida in the north. Almeida stood opposite of the Spanish fortresses of Ciudad Rodrigo and Fort Concepcion and its primary mission was to protect the crossings of the River Coa, which formed a natural barrier between Portugal and Spain.

Almeida sits on a small knoll that is the highest in the area. Although it was intended to protect the bridge over the River Coa, the bridge was two kilometers away and could not be seen from the fortress. According to Sir Charles Oman

"The outline of the place is almost circular, and exactly fits the round knoll on which it stands. It has six bastions, with demi-lunes and a covered way. There is a dry ditch cut in the solid rock, for Almeida lies on a bare granite plateau, with only two or three feet of earth covering the hard stratum below. It was well armed with over 100 guns, forty of which were 18-pounders or still heavier. It had casemates completely proof against bomb fire, and large enough to cover the whole garrison."

The Fortress of Almeida

In mid-1810, the Anglo-Allied forces under Lord Wellington were deployed in the vicinity of Ciudad Rodrigo. Wellington knew that he was not strong enough to prevent the French from invading Portugal. If he attempted to defend the Portuguese frontier, he risked losing his numerically inferior army and the war. His plan was to stay forward along the border as long as possible, but once the French began to move, he would retreat to the Lines of Torres Vedras. There extensive fortifications were being built and he would have a secure supply line.

Wellington knew that he could not stop the French from capturing the Spanish fortress of Ciudad Rodrigo, nor the Portuguese in Almeida. However his plan called for the fortresses to delay the French as long as possible, causing them to expend much valuable supplies and men. Wellington placed the defense of Almeida in the hands of Colonel William Cox a English officer who also held a commission as a brigadier general in the Portuguese Army. Cox was also the brother-in-law of Marshal Beresford, another British officer, who was in command of the Portuguese army. The Portuguese forces defending Almeida included:

24th Line Regiment (1200 men)

Arganil Militia Regiment (1000 men)

Trancoso Militia Regiment (1000 men)

Guarda Militia Regiment (1000 men)

3 Companies of the 4th Artillery Regiment (400 men)

One Squadron of the 11th Cavalry Regiment (61 men)

The siege of Almeida began on 24 July 1810, when French forces under Marshal Ney, attacked General Craufurd's Light Division in what is known as the action on the River Coa. This attacked pushed the remaining British forces back across the Coa and Almeida was on its own. The French began to dig siege works on 15 August southeast of the town and despite heavy Portuguese firing by 26 August they had 11 batteries in place with over 50 guns in place. The French fired 6,177 rounds and used 9 tons of powder with little effect. They continued firing through the night when a howitzer round landed in the courtyard of Almeida's castle, where the garrison's main powder magazine was located.

"According to a Portuguese artillery officer, 30 artillerymen were working in the magazine to transfer barrels of powder to the expense magazines on the ramparts so the great doors of the castle were open. The charged bomb rolled down the steps of the building into a subsidiary magazine and ignited 4,000 charged projectiles, which instantly ignited 150,000 pounds of gunpowder and over a million infantry cartridges."

Colonel Sprünglin, a French eyewitness wrote:

"The earth trembled and we saw an immense whirlwind of fire and smoke rise from the middle of the place. IT was like the bursting of a volcano — one of the things that I can never forget after twenty-six years. Enormous blocks of stone were hurled into our trenches, where they killed and wounded some of our men. Guns of heavy calibre were lifted from the ramparts and hurled down far outside them. When the smoke cleared off, a great part of Almeida had disappeared, and the rest was a heap of debris."

On 28 August, Almeida surrendered. The fortress that Wellington had hoped would buy him several months time, fell after a siege of five weeks. Within a month, the Anglo-Allied Army was in full retreat towards Lisbon.

Map of the French Siege of Almeida

Click on any thumbnail image for a larger view.

(Left to right)

  1. View from the WSW bastions looking towards the Coa River crossings.
  2. Main gate into Almeida.
  3. Sao Pedro Bastion, southwest of the main gate.
  4. Hills to the southwest where French siege works were.

(Left to right)

  1. Narrow, winding streets of Almeida.
  2. Infantry Barracks opposite the main gate.
  3. Santo Antonio Bastion in western corner.
  4. Ramp leading to the western parapet.

(Left to right)

  1. The Northern Bastion.
  2. Ruins of the castle destroyed by the powder magazine.
  3. Debris from the ruined castle.
  4. Tomb of Lieutenant John Beresford, a British officer of the 88th Regiment who died from wounds received in the storming of Ciudad Rodrigo in1812.



Almeida is small and maintains its character of 200 years ago. It is filled with narrow, winding cobblestone streets and the walls are in good shape. You can even climb down into the ruins of the castle. Walking the walls at night will give you the feel of how isolated the fortress is, for very few lights can be seen in the distance.

Almeida, with its well run Pousada (hotel) is an excellent base for exploring the numerous Napoleonic sites that are within a short drive:

Action On The River Coa

Barba del Puerco

Fort Concepcion

The Siege Of Ciudad Rodrigo

Wellington's Headquarters at Freineda

How to Get There

From Ciudad Rodrigo go west on E 80 until the Portuguese border crossing station (about 17 kilometers) at Vilar Formosa. Just east of Vilar Formosa take Highway 332 north for about 15 kilometers until you reach Almeida.


Horward, Donald (ed.) The French Campaign in Portugal: 1810-1811 An Account by Jean Jacques Pelet Minneapolis : University of Minnesota Press:; 1973.

Horward, Donald. Napoleon and Iberia: The Twin Sieges of Ciudad Rodrigo and Almeida, 1810 London : Greenhill Books; 1994.

Oman, Charles. A History of the Peninsular War Vol. III; New York : AMS; 1980.

Rathbone, Julian. Wellington's War: His Peninsular Dispatches London : Michael Joseph; 1984.


Placed on the Napoleon Series: July 2000