Geiseric the Lame (c. 389 – January 25, 477), also spelled as Gaiseric or Genseric, was the King of the Vandals and Alans (428–477) and was one of the key players in the troubles of the Western Roman Empire in the 5th century. During his nearly 50 years of rule, he raised a relatively insignificant Germanic tribe to the status of a major Mediterranean power — which, after he died, entered a swift decline and eventual collapse.
After Gunderic's death in 428, Gaiseric was elected king. He immediately began to seek ways of increasing the power and wealth of his people, who then resided in the Roman province of Hispania Baetica in southern Spain. The Vandals had suffered greatly from attacks from the more numerous Visigoths, and not long after taking power, Gaiseric decided to leave Spain to this rival Germanic tribe. In fact, he seems to have started building a Vandal fleet even before he became king.
In 439, after casting a covetous eye on the great city of Carthage for a decade, he took the city, apparently without any fighting. The Romans were caught unaware, and Geiseric captured a large part of the western Roman navy docked in the port of Carthage. The Catholic bishop of the city, Quodvultdeus, was exiled to Naples, since Geiseric demanded that all his close advisors follow the Arian form of Christianity. Nevertheless, Geiseric gave freedom of religion to the Catholics, while insisting that the regime's elite follow Arianism. The common folk had low taxes under his reign, as most of the tax pressure was on the rich Roman families and the Catholic clergy.
Added to his own burgeoning fleet, the Kingdom of the Vandals now threatened the Empire for mastery of the western Mediterranean Sea. Carthage, meanwhile, became the new Vandal capital and an enemy of Rome for the first time since the Punic Wars.
With the help of their fleet, the Vandals soon subdued Sicily, Sardinia, Corsica and the Balearic Islands. Geiseric strengthened the Vandal defenses and fleet, and regulated the positions of Arians and Catholics. In 442, the Romans acknowledged the Carthaginian conquests, and recognised the Vandal kingdom as an independent country rather than subsidiary to Roman rule. The area in Algeria that had remained for the larger part independent of the Vandals turned from a Roman province into an ally.
For the next 30 years, Geiseric and his soldiers sailed up and down the Mediterranean, living as pirates and raiders. One legend has it that Geiseric was unable to vault upon a horse because of a fall he had taken as a young man; so he assuaged his desire for military glory on the sea.
Maximus, who fled rather than fight the Vandal warlord, was killed by a Roman mob outside the city. Although history remembers the Vandal sack of Rome as extremely brutal — making the word vandalism a term for any wantonly destructive act — in actuality the Vandals did not wreak great destruction in the city; they did, however, take gold, silver and many other things of value. He also took with him Empress Licinia Eudoxia, Valentinian's widow, and her daughters, Eudocia and Placidia. Many important people were taken hostage for even more riches. Eudocia married Geiseric's son Huneric after arriving in Carthage,
In 468, Geiseric's kingdom was the target of the last concerted effort by the two halves of the Roman Empire. They wished to subdue the Vandals and end their pirate raids. Geiseric, against long odds, defeated the eastern Roman fleet commanded by Basiliscus off Cap Bon. It has been reported that the total invasion force on the fleet of 1,100 ships, counted 100,000 soldiers. Geiseric sent a fleet of 500 Vandal ships against the Romans, losing 340 ships in the first engagement, but succeeded in destroying 600 Roman ships in the second. The Romans abandoned the campaign and Geiseric remained master of the western Mediterranean until his death, ruling from the Strait of Gibraltar all the way to Tripolitania.
Following up the Byzantine defeat, the Vandals tried to invade the Peloponnese but were driven back by the Maniots at Kenipolis with heavy losses. In retaliation, the Vandals took 500 hostages at Zakynthos, hacked them to pieces, and threw the pieces over board on the way to Carthage.
In 474, Geiseric made peace with the Eastern Roman Empire. Finally, on January 25, 477, Geiseric died at Carthage.