Barry -<br>
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Evidence for the tetrarchic army is fairly fragmentary, but by comparing earlier and later details a rough picture can be constructed. As for legions of the later empire, this site:<br>
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www.livius.org/le-lh/legio/legions.htm<br>
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gives details of all known legion formations - go down the page a bit and you'll find lists of legions believed to have been created under the later emperors. Often these units are known only from a brick stamp or a tile, so there's not much to go on!<br>
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As for the Notitia, I think it's believed that those units listed with a number in their name (i.e Tertia, Septimani etc) derive from the earlier numbered legions of the Principiate. Try this site:<br>
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www.ne.jp/asahi/luke/ueda...terns.html<br>
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for a commentary on the ND and the units it lists.<br>
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AHM Jones (I'll get it right this time!) in his 'Later Roman Empire' gives a description of the assorted elite units of the tetrarchy and after - with many of these, it's impossible to say exactly when they were formed, but most would have been in existence by the end of Constantine's reign. The Herculani and Joviani legions had been formed by Diocletian as a field replacement for the Praetorians - the Scholae Palatini, so Jones believes, probably dated from Diocletian as well, as did the Scutarii and (more debatably) the Gentiles and Armaturae. The Corps of Protectores was in attendence on the emperor since before Diocletian - under Constantine they were distinguished as Protectores Domestici, and seem to have been a sort of officer cadet college.<br>
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Jones gives a couple of interesting careers for soldiers in the tetrarchic period - no dates, unfortunately:<br>
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"<em>Valerius Thiumpus, under Diocletian, served in Legio XI Claudia, then the Lanciarii, then became a Protectore. After five years he became Prefect of Legio II Herculia.<br>
Flavius Memorius was 28 years with the Joviani, six as Protectore, then was Prefect of the Lanciarii Seniores</em>."<br>
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Hope that helps a bit.<br>
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