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Roman domination over North Africa, which lasted over four centuries, ended with the Vandal conquest of the region. The loss of Africa, the Empire’s bread-basket, was a hard blow for the Romans, who tried several times to take back the region. In 468, the Western and Eastern Roman Emperors came together for a military campaign against the Vandals. Their defeat at the Battle of Cape Bon was the last Roman attempt to reconquer Africa.
Context

During the reign of Emperor Majorian (457-461), the Roman Empire reconquered Spain. Majorian wanted to continue by taking back North Africa from the Vandals, but failed. His officer Marcellinus managed to reconquer Sicily.
In 467, the Vandal King Gaiseric tried to invade the Peloponnese. With the Vandal fleet spreading further and further East, the Romans feared an attack against Alexandria. The Eastern Emperor Leo I, who had previously been hesitant to support the Western Empire against the Vandals, finally decided to intervene.
The Roman offensive
The Western Emperor Anthemius, the Eastern Emperor Leo I, and Marcellinus, a military officer who controlled a semi-autonomous territory in Illyria, came together in Sicily, to prepare a vast common offensive against Carthage.

The Romans decided to attack the Vandals on three fronts : Basiliscus, the commander of the Eastern Roman army, would attack Carthage by sea with the major part of the troops; Marcellinus would attack Sardinia from Sicily, and then join Basiliscus; while Heraclius, the governor of Egypt, would attack Carthage from the East, via Libya.
Marcellinus conquered Sardinia, while Heraclius took control of Tripolitania. Basiliscus’ fleet anchored close to Cape Bon and waited for Marcellinus. However, a large part of Marcellinus’ fleet, led by Ricimer, a general with Germanic origins, refused to leave. Ricimer might have deliberately tried to sabotage the operation.
The Roman landing on Cape Bon was one of the largest military operations of this kind in ancient history: over 50.000 fighters and a thousand ships participated.

The Vandal King Gaiseric asked for a truce to negotiate. During this time, the Vandals filled their ships with flammable materials, and then, at night, they set fire to their ships and projected them against the Roman fleet, which was taken by surprise. Over half the Roman fleet was burned.
Later on
Basiliscus and Marcellinus fled to Sicily with the survivors of their army, while Heraclius fled across the Libyan desert. In Sicily, Marcellinus was assassinated by Ricimer.
Julius Nepos, the nephew of Marcellinus, became Western Emperor from 474 to 475. Basiliscus became Eastern Emperor in 475-476.
This Roman defeat was the last step in the decline of the Western Roman Empire, which was now limited to Italy and Sicily. The last Emperor, Romulus Augustulus, was deposed in 476, by the German chief Odoacer.



























