Northern Africa 285: Rise of Diocletian

Political map of Northern Africa on 21 Jul 285 (NO MAPS FOR THIS PERIOD YET: Rise of Diocletian), showing the following events: Probus’ Frankish revolt; Carus’ Persian campaign; Diocletian’s revolt; Fall of Volubilis; Battle of Margum.

After Probus’ successor Carus (282–3) died on campaign in Persia, the popular general Diocles was proclaimed emperor by the eastern legions. Taking the name ‘Diocletian’, the new emperor marched west to defeat Carus’ son Carinus at Margum.

Main Events

280?–281? Probus’ Frankish revolt

Receiving news of the revolts in Gaul, Probus made a truce with the Persians and returned west, resettling a large number of Bastarnae who submitted to him in Moesia or Thrace. Meanwhile, some Franks that he had also resettled rose up in revolt and gained control of a fleet of ships. After raiding Greece and Syracuse, and suffering a repulse outside Carthage, they successfully sailed back to their homeland on the Rhine wikipedia

283 Carus’ Persian campaign

Having learned that Persia was in civil war in late 282, Carus marched rapidly to the East and invaded Mesopotamia via Armenia in spring 283. The Romans successfully stormed Ctesiphon and Seleucia but, in around July 283, Carus fell ill. The emperor was found dead some days later, apparently after lightning had struck his tent, prompting his son Numerian to abandon the wikipedia

20 Nov 284 Diocletian’s revolt

Upon the discovery of the death of Numerian, an assembly and tribunal were organized, in which the low-born but popular general Diocles denounced the praetorian prefect Aper as the murderer and personally ran him through with his sword. Diocles was then proclaimed emperor by the troops, adopting the more Latinate name “Diocletian”. Despite his claim to be the avenger of Numerian, Diocletian rejected the rule of Carus’ other son Carinus and marched west to depose wikipedia

284?–285? Fall of Volubilis

During the Crisis of the Third Century, the Baquates and other Berber tribes became increasingly aggressive, forcing more and more concessions from the Roman inhabitants of southern Mauretania Tingitana. This came to an end in around 284–285, when, for unknown reasons, Roman authorities evacuated Volubilis and other cities south of the Loukkos river to fall back on Tingis (Tangier). Although the region would never be retaken by the Romans, Diocletian eventually secured land communications between Mauretania Tingitana and Mauretania Caesariensis by forming an alliance with the wikipedia

Jul 285 Battle of Margum

In July 285 the Roman emperor Carinus advanced to meet the usurper Diocletian near Margum, on the Margus river, in Upper Moesia. Despite having superior numbers and apparently coming close to winning the battle, the emperor was abandoned by his own troops and defeated. Carinus died soon afterwards, possibly murdered by one of his own officers when he took refuge in the Danube fort of Cornacum (Sotin, Croatia), leaving Diocletian as sole ruler of the Roman wikipedia