 Complete the following phrase:  The date of the legions creation is also not certain, although Graham Webster assigns it to the year 101. The earliest dated inscription referring to the legion, which lists the posts Lucius Cossonius Gallus held during his career, again entangles the XXI Rapax in the origins of this legion, for Gallus was first a military tribune with the first unit, then some years later commissioned commander of the II Traiana most likely after he had distinguished himself in Trajans 