A singular term for an allied state or people bound to Rome by formal treaty (singular of foederati).
Latin masculine singular form meaning 'allied by treaty', from 'foedus' (covenant), designating the specific legal status of Rome's treaty partners.
A foederatus had a special legal position—not conquered but bound—which meant they kept their own rulers, culture, and laws while providing military service to Rome, basically outsourcing defense.
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