Battle of Bussaco

Masséna attempted to break through the Anglo-Portuguese defensive line entrenched on the heights of Bussaco. The frontal assault led by Reynier and Ney failed against a well-organized defense and well-positioned allied artillery. Despite numerical superiority, the French army suffered a costly tactical defeat.

After invading Portugal, Masséna sought to march on Lisbon. Wellington, knowing the terrain, chose to defend the wooded and steep heights of Bussaco. He hoped to inflict severe losses on the French before withdrawing behind the Lines of Torres Vedras.

Masséna ordered a double frontal attack: Reynier's corps in the east, Ney's in the west. The French climbed the slopes under allied artillery and entrenched infantry fire. Despite some penetrations, they were repulsed by well-coordinated Anglo-Portuguese counterattacks.

Although the road to Lisbon remained open, the battle slowed the French advance and reduced the morale of Masséna's troops. It allowed Wellington to prepare the defensive lines behind which he would successfully withdraw. The 1810 campaign bogged down.