Key Facts
- Dates
- 18 April – 2 May 1809
- Portuguese force
- ~10,000 regular and irregular troops
- French force
- ~9,000 troops
- Duration of standoff
- Nearly two weeks
- Portuguese losses (captured)
- 10 guns, 5 standards, several hundred prisoners
Strategic Narrative Overview
Unable to cross the bridge, Loison requested reinforcements, and Soult sent five additional generals with troops, concentrating roughly 9,000 French soldiers on the river's west bank. The Portuguese had mined the bridge, posing a dilemma for the French. Engineer captain Pierre-François Bouchard devised a plan to detonate the French side of the bridge to sever the mine's cord without triggering it, allowing a surprise assault. This stalemate held for nearly two weeks, diverting a significant portion of Soult's Army of Portugal.
01 / The Origins
During the second French invasion of Portugal in 1809, Marshal Soult established himself at Porto and sought to link up with General Lapisse's force in western Spain. Following Silveira's earlier victory at Chaves, Soult dispatched General Loison eastward to open a route to Spain, but Loison's advance was blocked by a mixed Portuguese force of regulars and militia under Francisco da Silveira at Amarante on the Tâmega River.
03 / The Outcome
The French successfully stormed the bridge after Bouchard's ruse neutralised the mine, capturing ten Portuguese guns, five standards, and several hundred prisoners. Although the French ultimately broke through, the prolonged delay had strategic consequences: the Portuguese resistance gave British forces the opportunity to advance on Coimbra and Oporto, contributing to Soult's subsequent difficulties in Portugal.
Belligerents & Mobilization Analysis
Side A
1 belligerent
General Loison, Marshal Soult, Pierre-François Bouchard.
Side B
1 belligerent
Francisco da Silveira.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.