[1][4] A Spanish force of 3,000–3,500 men led by Francisco Espoz y Mina intercepted a great French convoy (2,000–3,000 regulars and 150 cavalry) of General of Division Caffarelli.

[4] The attack was a success, and after one hour, the French were completely defeated.

[2] The Spanish casualties were estimated at 30 killed and wounded, and the French lost between 600 and 700 men, and 300 captured.

[1][2] The Spanish also rescued 800 Spanish, British and Portuguese prisoners (five officers), and captured the valuable convoy (weapons and baggage, two colours, letters from Joseph Bonaparte to Napoleon, and a great amount of jewelry, valued between 700,000 and 800,000 francs).

[1][3] Joseph Bonaparte's personal secretary, Jean Deslandes, was killed in this action.