The
Second Portuguese campaign had started with the
Battle of Braga.
French occupation In the
First Battle of Porto (28 March 1809), the
French under Marshal Soult defeated the
Portuguese under Generals Lima Barreto and Parreiras outside the city of
Porto. After winning the battle, Soult stormed the city. In addition to 8,000 military casualties, large numbers of civilians died. Approximately half of these are thought to have died in the
Porto Boat Bridge disaster, when the city's only bridge, a pontoon bridge (or 'ponte de barcas'), was destroyed. Having thus secured Portugal's second city, with its valuable dockyards, arsenals and materiel Soult halted at Porto to refit his army before a planned advance on Lisbon. While Soult was in Porto, a detached French force operated to the east under the leadership of Major-General
Louis Loison. Initially, this force included
General of Division Henri Delaborde's infantry division and Lorge's cavalry division. A Portuguese force under
Major General Francisco Silveira captured the French garrison of
Chaves, a border town on the river Minho, and blocked Soult's communications with Spain by blockading the area around
Amarante. From 18 April to 3 May, the Portuguese held Loison on the west bank of the
Tâmega River. On the latter day, French engineers succeeded in disarming the explosives-rigged bridge so that Delaborde's infantry could cross it. Soult's refitting in Porto proceeded at a rather leisurely pace. His plans to advance south to Lisbon were then disrupted by the return to Portugal in April 1809 of
General Arthur Wellesley, to command the British army, reinforced with Portuguese regiments trained by
General Beresford. Wellesley immediately adopted an offensive strategy and his combined force proceeded to advance rapidly north from
Lisbon via
Coimbra towards Porto. By the second week of May 1809 it was clear to Soult that his original plan to advance to Lisbon was unworkable, indeed he was more concerned about Wellesley's rapid advance and the deficiencies in his own lines of communication. He decided to abandon Porto and withdraw north eastwards back to Spain. On 11 May he sent General of Division
Julien Augustin Joseph Mermet's division off with the baggage and the artillery park. Soult himself stayed up late that night with his staff drawing up his remaining withdrawal plans. Soult was, however, in no great hurry to complete his withdrawal from Porto, because he considered himself to be in a strong defensive position. The river Douro formed a formidable natural barrier: tidal, deep, fast-flowing and 200 yards wide in Porto. There was no bridge: the only crossing, a pontoon bridge between Porto and
Vila Nova de Gaia, had been destroyed two months previously during the
First Battle of Porto. Soult's army had also either destroyed or removed to the Porto side of the river all the boats from the opposite bank at Vila Nova de Gaia, and many of them were now moored on the north bank on the wharves of , where they lay under the guard of French troops. There were many such boats, in particular wine barges, because Porto was (and remains) the hub of the
port wine trade, and many wine cellars were located in Vila Nova de Gaia (as they still are to this day). Soult believed that Wellesley's army could only cross the Douro downstream of Porto, and with great difficulty. To cover such a threat, Soult's troops were largely deployed to the west of the city. Soult retained a total of 10,000 infantry and 1,200 cavalry in Porto. Delaborde's division included three battalions each of the 17th Light, 70th Line, and 86th Line Infantry Regiments. General of Division
Pierre Hugues Victoire Merle's division was composed of four battalions each of the 2nd and 4th Light Infantry Regiments, and three battalions of the 36th Line Infantry Regiment. General of Division
Jean Baptiste Marie Franceschi-Delonne's cavalry was made up of the 1st
Hussar Regiment, 8th
Dragoon Regiment, and the 22nd and Hanoverian
Chasseurs à Cheval Regiments.
Anglo-Portuguese advance After coming up from
Lisbon at pace, on 11 May the Anglo-Portuguese force under Wellesley fought a skirmish with the French 10 miles south of Porto at the
Battle of Grijó. Arriving later the same day at
Vila Nova de Gaia on the
Douro immediately opposite Porto, Wellesley was unable to cross the river, as Soult had anticipated. Wellesley positioned his army there, with his headquarters in the prominent convent
Monastery of Serra do Pilar (Mosteiro da Nossa Serra do Pilar in Portuguese) on high ground on the south bank, level with the heights of Porto on the north bank. The monastery still stands, the dominant feature of the southern skyline viewed from Porto. According to one historian, 18,400 men at Wellesley's command were organised thus: •
Lieutenant General (LG)
William Payne's Cavalry Division • 1st Cavalry Brigade (MG Stapleton-Cotton; 14th LD (minus one sqn), 16th LD, 20th LD (2 sqns) and 3rd
King's German Legion (KGL) LD (1 sqn)) • LG
Edward Paget's Division (5,145) • 1st KGL Brigade (
Brigadier General (BG) Langwerth; 1st and 2nd KGL Line) • 3rd KGL Brigade (BG Dreiburg; 5th and 7th KGL Line) • 6th Brigade (BG R. Stewart; 29th, 1st Bn of Detachments and 1/16th Port. Line) • LG
John Coape Sherbrooke's Division (6,706) • 2nd Guards Brigade (BG
Henry Frederick Campbell; 1/Coldstream Gds and 1/3rd Guards) • 4th Brigade (BG Sontag; 97th, 2nd Bn of Detachments and 2/16th Port. Line) • 5th Brigade (BG A. Campbell; 2/7th, 2/53rd and 1/10th Port. Line) • MG
Rowland Hill's Division (4,370) • 1st Brigade (nominally MG Hill, in fact his senior Col.; 1/3rd, 2/48th and 2/66th) • 7th Brigade (BG A. Cameron; 2/9th, 2/83rd and 2/10th Port. Line) There were four 6-gun artillery batteries (RA: Sillery, Lawson. KGL: Tieling, Heise) under
Colonel (Col) Edward Howorth. One had 9-pounders, two had 6-pounders and one had 3-pounders. Historian
Michael Glover stated that the order of battle was somewhat different. Glover lists the following organization. • 1st Guards Brigade: BG Henry F. Campbell, 2,292 (same as 2nd Brigade above) • 2nd Brigade: BG Alexander Campbell, 1,206 (same as 5th Brigade above) • 3rd Brigade: BG John Sontag, 1,307 (same as 4th Brigade above) • 4th Brigade MG Rowland Hill, 2,007 (same as 1st Brigade above) • 5th Brigade: BG Alan Cameron, 1,316 (same as 7th Brigade above) • 6th Brigade: BG Richard Stewart, 1,290 (same as above) • 7th Brigade: MG
John Murray, 8th Baronet, 2,913 (same as 1st and 3rd KGL Brigades above, plus detachments of 1st and 2nd KGL Light) • Cavalry: MG Stapleton Cotton, 1,463 (same as above) • Artillery: Col Edward Howorth, 24 guns (same as above) Farther to the east,
William Carr Beresford (Marshal of the Portuguese army) led MG
Christopher Tilson's British 3rd brigade (1,659 British and ca. 600 Portuguese grenadiers by 6 May morning state) and 5,000 Portuguese to link up with Silveira's force. They threatened Soult's line of retreat. MG Alex Randoll Mackenzie's British 2nd brigade and a large Portuguese force operated some distance away on the line of the Tagus river. ==Battle==