Auxilia

thumb|300px|Roman auxiliary infantry crossing a river, probably the Danube, on a [[pontoon bridge during the emperor Trajan's Dacian Wars (101–106 AD). They can be distinguished by the oval shield (clipeus) they were equipped with, in contrast to the rectangular scutum carried by legionaries. Panel from Trajan's Column, Rome]] The '''''' (, ) were introduced as non-citizen troops attached to the citizen legions by Augustus after his reorganisation of the Imperial Roman army from 27 BC. By the 2nd century, the contained the same number of infantry as the legions and, in addition, provided