At the Battle of Fuentes de Oñoro, the Anglo-Portuguese Army under Wellington checked an attempt by the French Army of Portugal under Marshal André Masséna to relieve the besieged city of Almeida.

The Anglo-Portuguese Army was the combined British and Portuguese army that participated in the Peninsular War, under the command of Arthur Wellesley. The Army is also referred to as the British-Portuguese Army and, in Portuguese, as the Exército Anglo-Luso or the Exército Anglo-Português.