Bonifatius

An ally of Galla Placidia, mother and advisor of Valentinian III, Bonifacius engaged in Roman civil wars on her behalf against the generals Felix in 427-429 and Aetius in 432.

[3] Later that decade, Bonifatius was known to be a tribunus commanding a Gothic regiment of foederati in North Africa campaigning against the Mauri, and had a friendship with St. Augustine of Hippo with whom he discussed theological matters.

[6] After the death of Emperor Honorius the primicerius notariorum Joannes was elevated to the throne by Castinus in 424, and Bonifatius responded by cutting off the Grain supply from North Africa, showing his support for the Theodosians (Placidia and Theodosius II).

[9] After a revolt in Gaul and a military campaign under the eastern generals Ardabur and Aspar sent by Theodosius II, Joannes was overthrown, and Valentinian III, half-nephew of Honorius, was made Western emperor by the magister officiorum Helion.

Bonifatius was accused of attempting to form his own empire in Roman Africa at the allegation of Flavius Constantius Felix, who had also been a staunch supporter of Placidia and had been installed as the magister utriusque militiae of the west by Theodosius II.

Leaving it at the mercy of Gaiseric, Bonifatius retreated out of the city to join his forces with the Eastern Roman general Aspar, who had been sent to reinforce Africa by Theodosius II.

Allegedly Sebastianus was preparing to fight Aetius by summoning the Visigoths to his aid, but he was evidently unpopular among the troops and allowed them to engage in piracy, and had lost support in the court as well.

Sebastianus was exiled, and as a result Aetius became the dominant power in the Western Roman Empire, and married Bonifacius' widow Pelagia allegedly at his request.