Analysis of information sources in references of the Wikipedia article "Colonial troops" in English language version.
[W]hen Scipio carried the war into Africa, the most useful local auxiliaries of Carthage, the Numidians, went over to the Romans, and victory with them.
The purpose of the Fixed Regiment was to enlist the local inhabitants in its own defense. Fixed Regiments, unlike Spanish [mainland Iberian] Peninsular Regiments, did not rotate and remained in colonies where they served.
