Legio IX Hispana had a long and active history, it being one of the key legions during the various campaigns of conquest in Britain and later founding York, from where it guarded the northern frontiers in Britain. But the last evidence for its existence in Britain comes from AD 108 in York, after which it completely vanishes from history. The mystery of its disappearance has inspired debate and imagination for decades, for example with Rosemary Sutclliffe’s best selling Eagle of the Ninth and subsequent Hollywood blockbusters.

Here, historian, broadcaster and CBA Trustee Dr Simon Elliott considers the evidence for four of the theories, and other possibilities, regarding its fate, all based on his new best selling book. Watch to learn more!