Fossa Regia

The Fossa Regia, also called the Fosse Scipio, was the first part of the Limes Africanus to be built in Roman Africa.

[1] The Fossa was dug by the Romans after their final conquest of Carthage at the end of the Third Punic War in 146 BC.

Even after these two provinces were merged into Proconsular Africa in 27 BC, the ditch continued to be maintained as late as the year 74 AD under Vespasian as shown by many stone marker posts that have been found.

Ea pars quem Africam appellavimus dividitur in duas provincias, veterem ac novam, discretas fossa inter Africanum sequentem et reges Thenas usque perducta.

Under Theodosius that area[3] was fully Romanized with one third of the population made of Italic colonists and their descendants, according to historian Theodore Mommsen.

The Fossa Regia marked the border between the original Roman province of Africa and Numidia. East of Fossa Regia (area in red) there was full Latinisation
The Fossa regia marked approximately the border (in pink) between the province of Africa and Numidia