 The Vandals under their king Genseric crossed to Africa in 429, either as a request of Bonifacius, a Roman general and the governor of the Diocese of Africa, or as migrants in search of safety.They subsequently fought against the Roman forces there and by 435 had defeated the Roman forces in Africa and established the Vandal Kingdom.Genseric was considered a heretic, too, an Arian, and though Arians commonly despised Catholic Christians, a mere promise of toleration might have caused the city's population to accept him.