Constantius Chlorus conducted campaigns against the Picts from Yorkshire, using Eboracum as his base. He died at York on 25 July 306, and his troops immediately proclaimed his son Constantine as Augustus — the proclamation that began the career of Constantine the Great. York was thus the birthplace of the emperor who would Christianise the Roman Empire. The Constantine statue outside York Minster commemorates this event.
Constantine I: c. 3,000–5,000 troops at York. Rival claimants: dispersed, numbers uncertain.
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