Vandal Conquest of North Africa (429-439): Gaiseric's Kingdom

The Vandal conquest of North Africa was the decade-long campaign, from 429 to 439, in which the Vandal king Gaiseric led his people from Spain across the Strait of Gibraltar and seized the Roman provinces of Africa. The fall of Carthage on 19 October 439 deprived the Western Roman Empire of its richest tax base and a key source of grain, and created a Vandal kingdom that lasted almost a century.

Background

The Vandals and Alans had entered the empire in the Crossing of the Rhine and had been settled in Spain since 409. After heavy defeats by Visigoths fighting for Rome in 416–418, the survivors united under the Hasding Vandal kings. In 428 Gunderic died and his half-brother Gaiseric became king.

Africa was an obvious target. The provinces of Africa Proconsularis, Byzacena and Numidia (roughly modern Tunisia and eastern Algeria) were prosperous, lightly garrisoned and largely untouched by war. Their grain fed Rome, and their taxes helped pay the Western army.

The crossing and the siege of Hippo

In May 429 Gaiseric’s people crossed from southern Spain, probably from near Iulia Traducta (Tarifa), to Mauretania Tingitana. Victor of Vita says a count was taken and 80,000 people were recorded. The Vandals then advanced east over hundreds of kilometres of coastal country.

The Roman commander in Africa, Count Boniface, was defeated and in May or June 430 the Vandals besieged him in Hippo Regius (modern Annaba, Algeria). Its elderly bishop, the theologian Augustine, died on 28 August 430 in the third month of the siege. The city held out for about fourteen months before the Vandals abandoned the blockade. A relief army from the Eastern Empire under the general Aspar was beaten in 431, and Boniface left for Italy in 432.

Treaty and the capture of Carthage

On 11 February 435 the Western government made a treaty at Hippo recognising the Vandals as federates holding parts of Numidia and Mauretania. Gaiseric used the truce to prepare. On 19 October 439 he seized Carthage by surprise, apparently without a major battle, and later Vandal kings dated their reign from this event.

The conquest was followed by confiscation of land from Roman nobles and Catholic churches, especially in Proconsularis. The Vandals were Homoian (Arian) Christians, and Victor of Vita’s account of their persecution of Catholic clergy, though polemical, shows how bitter the religious conflict became. A treaty of 442 with Emperor Valentinian III recognised Vandal rule over the richest provinces.

Consequences

With the shipyards and fleet of Carthage, Gaiseric became a Mediterranean naval power. He raided Sicily and the coasts of Italy, and in 455 his forces plundered Rome itself, the subject of Vandal Sack of Rome (455). A huge combined Roman expedition against him failed off Cape Bon in 468.

The loss of African revenues crippled the Western Empire in its final decades. The Vandal kingdom outlived it, surviving until the Byzantine general Belisarius conquered it in 533–534, as told in Vandalic War (533-534).

Key people

• Gaiseric (king 428–477): the lame but formidable king who led the crossing and ruled for almost half a century. Contemporaries described him as cunning, reserved and ruthless.
• Boniface (died 432): Roman count of Africa and friend of Augustine. He failed to stop the Vandals and died of wounds after defeating his rival Aetius in an Italian civil war.
• Augustine of Hippo (354–430): bishop, theologian and author of The City of God, who died in his besieged city.
• Aspar: Eastern Roman general of Alan descent, sent with an army to Africa in 431.
• Valentinian III (Western emperor 425–455): the young emperor whose government twice negotiated treaties with Gaiseric.

Myths and facts

Myth: Boniface invited the Vandals into Africa. This story appears in Procopius, writing about a century later, and in some other later sources. No contemporary writer mentions it, Boniface fought the Vandals for years, and most modern historians treat it as a later explanation for a shocking defeat.

Myth: the Vandals destroyed Roman Africa. There was violence and confiscation, but Carthage remained a large and wealthy city. Latin culture, Roman law and much of the old economy continued, and Latin poets wrote at the Vandal court.

Fact: the crossing involved a whole people. The migrants included women, children, old people and slaves as well as warriors, which is why moving them across the strait was such a large undertaking and why the advance east was slow.

Timeline

• 428: Gaiseric becomes king of the Vandals and Alans.
• 429, May: Vandals and Alans cross from Spain to Africa.
• 430, May or June: Siege of Hippo Regius begins.
• 430, 28 August: Augustine of Hippo dies during the siege.
• 431: Siege lifted; Aspar’s relief army defeated.
• 435, 11 February: Treaty makes the Vandals federates in Numidia.
• 439, 19 October: Gaiseric captures Carthage.
• 442: New treaty recognises Vandal rule in Proconsularis and Byzacena.

Why it matters

The Vandal conquest was the most damaging territorial loss the Western Empire suffered before 476. By taking Africa, Gaiseric removed the West’s financial backbone and turned the Mediterranean, once a Roman lake, into a contested sea.