Marmont with 49,000 French troops attempted to cut the lines of communication with Portugal of Wellington's 51,000 troops. All Marmont's moves and after he was wounded and his deputy killed General Clausel's moves were predicted and successfully aggressively countered. The French lost over 13,000 men killed or captured. Only a courageous fighting retreat by General Ferrey's division prevented a total rout of the French.
Wellington's credentials as an attacking General were established.

A major Spanish city 111 miles northwest of Madrid. (Spain)

French Peninsular Army

Number engaged :

49,652

Casualties :

14,000 (28.20%)

British Peninsular Army

Number engaged :

51,939

Casualties :

4,762 (9.17%)