A Latin Scholar, eh?
Or an ex-trooper, perhaps?
Actually it used to be the motto of the 13th/18th Royal Hussars (Queen Mary’s Own), but was adopted later (upon amalgamation with the 15th/19th The King’s Royal Hussars) by The Light Dragoons, as you mention.
OK, then ... how about Arte et Marte
... or even In Arduis Fidelis?
All of which, of course, has very little to do with Mark's original post!