In both cases the rulers obtained Roman instructors to train their new army. However, I have always been somewhat sceptical about the Numidian imitation legionaries. This event took place shortly after the second Punic war, and at this point the Roman legion was still a citizen force rather than a professional army. Numidia did not possess an equivalent class of citizens, so who did they train? And would the Numidian horse-aristocracy accept the formation of a powerful infantry force that would upset the social balance of power? I also don't see how a Roman-style heavy infantry force would fit into the Numidian way of warmaking.
I know very little of Numidia, though, so this is nothing but speculation on my part.
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