The Centurion and his horse questions.

[Matt Lukes]

Of course while it may have been more difficult to do so if they were on foot rather than mounted it still doesn't amount to proof about the base question about Centurion's having been mounted on the march.

How difficult would it be to advance with the scouts to select a site for the camp? (Caesar, Gallic War 2.17: "[Caesar] sent forward scouts and centurions, who were to select a suitable site for the camp".) Maybe they just hitched a ride?

That's interesting because it's the same situation as I quoted from Dionysius- the old Centurio was to ride out and find a better site for the camp; it certainly make sense that this is the kind of thing that couldn't be allowed to take very long since building the camp isn't a quick process and has the limitations of being a best done in daylight operation. It'd take quite a long time to move about in the general area to find the best site so horseback seems the only logical way to do it- but marching from point a to point b, however, that's different- there riding is just a comfort (over walking).