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Britannica Sources used in this answer

Where were the three Roman legions based in Britain after Hadrianā€™s reign?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Historical map of ancient Britain featuring three sections: a main map of Roman Britain showing Roman roads, frontier walls, principal settlements, forts, mines, and key tribal regions; an inset of prehistoric Britain marking Neolithic, Mesolithic, and Bronze/Iron Age sites; and a smaller map illustrating the stages of Roman conquest with color-coded tribal territories and years of conquest.
Roman Britain

Following the reign of the emperor Hadrian, the three Roman legions stationed in Britain were based at the following locations:

  • York (Eburacum): The base for the 6th Legion.12
  • Chester (Deva): The base for the 20th Legion.12
  • Caerleon (Isca): The base for the 2nd Legion.12

These three legions, totaling approximately 15,000 heavy infantry, formed the foundation of Roman military power in the province and were supported by a large number of auxiliary regiments stationed in smaller forts near the frontiers.12