The Battle of Fuentes de Oñoro Historical milestone · Fuentes de Oñoro, Ciudad Rodrigo, Salamanca In the spring of 1811, over three days, 36,000 Anglo-Portuguese infantry under Wellington withstood the attack of Masséna's 42,000 troops at Fuentes de Oñoro. The outcome was tactically indecisive, with more than 2,800 French casualties, but it allowed Wellington to maintain the blockade of Almeida. 3-5 de mayo de 1811 Photo: Alta Falisa (CC BY-SA 4.0) What to see and do in Fuentes de Oñoro