Several legions feature or are referred to in Rosemary Sutcliff’s historical novels. A legion (legio) is identified by a number, but the number may not be unique – in Britain for there were, for a time, two II Legions.

The Roman Army had two main parts: the legions and the auxiliary units (auxilia). About thirty legions were spread over time around the provinces of the Roman Empire. Some legions were lost, others disbanded. They were created as needed, recruited from Roman citizens across the Empire. The legions were regular heavy infantry units, with a contingent of 120 horsemen who worked as messengers and scouts. Auxilias involved non-citizens, and were both infantry and cavalry.

II (2) Legion:  Eagle’s Egg, Frontier Wolf, Outcast, Song for a Dark Queen, Sword at Sunset, The Eagle of the Ninth, The Silver Branch

VI (6) Legion: A Circlet of Oak Leaves, Frontier Wolf, Sword at Sunset, The Eagle of the Ninth

VII (7) Legion: The Silver Branch

IX (9) Legion: Eagle’s Egg, Song for a Dark Queen, Sword at Sunset, The Eagle of the Ninth, The Silver Branch

X (10) Legion: The Silver Branch

XIV (14) Legion: Eagle’s Egg, Song for a Dark Queen

XX (20) Legion: Eagle’s Egg, Frontier Wolf, Outcast, Song for a Dark Queen, Sword at Sunset

XXII (22) Legion: Outcast

XXX (30) Legion: The Silver Branch

• Source:  Sutcliff Wiki