High Imperial Roman army vs Late Roman army

[Robert Vermaat]

Furthermore, Spain was never meant to see combat - the Spanish army existed but was not experienced. they would have had highly trained, but no veteran soldiers and Generals. When Maxentius usurped in Spain in 413, he had a Spanish Army, so it certainly did exist, but it was not a capable force.

I agree. Constantine III was attacked by several of Honorius' relatives - I imagine they had more than their own guards and kitchen slaves! I assume that the Spanish cities had militias, which (as we see in Gaul) were transformed after 411 into regular units, but I think of a much lower quality.