The Centurion and his horse questions.

[Iosephus]

just some more thoughts to think about:

- having a horse is very practical if you have to supervise a loooong infantry marching column (even if you are responsible for only a fraction of it)
- according to my understanting centurions were rich enough to have own horses (instead of "issued" from the army)
- just as they were rich enough to have one or more slaves with them (again private property) during campaigns/marches for making uncomfortable things for them (eg. setting up the boss' tent, cooking, washing, polishing armour, tending the horses, etc)

again, no proof, only speculating