mobile army, prior to the reign of Diocletian. Jones cites the record of a consular interrogation from Numidia in 320, in which a Latin grammarian named Victor stated that his father was a decurion in Cirta (modern Constantine), and his grandfather served in the comitatus, 'for our family is of Moorish origin'. By the time of Diocletian, Moorish cavalry were no longer part of the mobile field army, but rather were stationed along the Persian and Danube borders. There was one regiment of Equites Mauri in "each of the six provinces from Mesopotamia to Arabia". The Mauri were part of a larger group called Equites Illyricani, indicating previous service in Illyricum. While many Mauri were part of the Roman empire, others resisted Roman rule. As Gibbon related for the years 296–297, "From the Nile to Mount Atlas, Africa was in arms."<ref>Gibbon, Edward. The Decline and Fall of the Roman Empire", vol. 1, p. 409.</ref> Diocletian's co-emperor Maximian campaigned against the Mauri for two years, entering into their mountain fastness to terrify them of Rome's power. This may be the reason why the border legions of northwest Africa were reinforced in Diocletian's time with seven new legions spread through Tingitania, Tripolitania, Africa, Numidia, and the Mauritanias. In the 370s, Mauri raided the Roman towns of Northwest Africa. Theodosius the Elder campaigned against them in 372. A Moorish tribe called the Austoriani are specified as participating in these raids. According to Jones, who follows Ammianus Marcellinus, the raids into Tripolitania were caused by the "negligence and corruption of Romanus, the comes Africae ... in 372 Firmus, a Moorish chieftain with whom Romanus had quarrelled, raised a revolt, winning several Roman regiments to his side". Theodosius defeated the rebellion, but was executed shortly thereafter in Carthage. Firmus' brother Gildo, also a Moorish chieftain, joined the Romans and helped defeat Firmus' revolt. As a reward, he was given the post of magister utriusque militiae per Africam, or master of foot soldiers and cavalry for Africa. In 397 he broke his allegiance to the Western Empire, then under the control of the child emperor Honorius and his master of soldiers Stilicho. Gildo withheld the corn ships from Rome and declared allegiance to Stilicho's enemy Eutropius in Constantinople. Eutropius sent encouragement but no troops or money. The Roman Senate declared Gildo a public enemy (hostis publicus). Gildo had another brother called Mascezel. At some point, Gildo