Rome and (lack of) Cavalry

[al Roumi]

The Romans did use cavalry, lots of it, but the vast majority was provided by Rome's allies in the form of auxiliaries.

Yep, afaik the Romans recruited their auxiliaries from "horse people" accross and outside the empire, precisely because these groups had skills the Romans did not specialise in. Also afaik there were eastern european cavalry auxilliaries stationed in England -with some evidence of their presence/garrison on Hadrian's wall (on the border with Scotland).