Prince Adalbert of Prussia (WIA) The Battle of Tres Forcas was a battle on 7 August 1856 between boat crews from the Prussian Navy corvette SMS Danzig (then on a foreign cruise, commanded by Prince Adalbert of Prussia) and the Berber Riffians.

There, four years earlier, on 7 December 1852, the Prussian warship Flora had been shot at by pirates, with one sailor killed and its captain injured.

Around noon, he led a surprise attack on a steep rock face nearly 40 metres high under heavy enemy fire.

However, they were also receiving continuous reinforcement, so Adalbert finally decided to withdraw, lest he and his troops become cut off from the shore.

A subscription from the whole Prussian Navy raised a monument to the dead of the battle in Gibraltar in the form of an eagle, set up in 1863.