The Battle of Foz de Arouce was an engagement of the Peninsular War which took place on 15 March 1811 between Anglo-Portuguese forces under Arthur Wellesley (later the Duke of Wellington) and French troops under the command of Marshal Michel Ney.

Some companies of the 95th Rifles (of the Light Division) followed a narrow road and reached the center of Foz de Arouce, very close to the bridge, meeting almost without opposition.

The confusion of combat with these companies, on the side of the bridge, alerted the French troops to the danger of being cut off from the rear and several units left the battle line and hurriedly headed towards the river.

Ney saved the situation by launching the 3rd Battalion of the 69th Regiment (3/69me) in a counterattack against the companies of the 95th Rifles that had entered Foz de Arouce and were threatening the bridge.

While they were doing so, they were victims of allied artillery fire and also of the VIII CE, which in the midst of the confusion could not distinguish between friendly and enemy forces.