Yoruks!

'Ah!', says Hospodar Casimir. 'These look like saner fellows!'
'Indeed so, my lord', replies Bulbous. 'They never stop complaining about having to live in Mittelheim'.
'And these would be more irregular cavalry?' asks Casimir.
'Yoruks', replies the general.
'That's a little rude, Bulbous - but I think I'm right'.
'No, no, my lord - Yoruks: they are Yoruk cavalrymen provided from the Borat region!'

'Borat ? Yes: not, if I remember rightly, a terribly prosperous region in my Sanjak'.
'No , my lord. I think that there are parts of the province where fleas are actually legal tender. But it is such poverty that encourages them to volunteer. Actually, what you see my lord are the more prosperous of the Borats, since they do at least possess horses'.
'How did they buy them? What is the exchange rate like on Borat fleas?'
‘"Buy", my lord?  I’m not sure that "buying" is their normal procedure when it comes to purchasing horses. Generally, I think that they tend to "borrow" them from other peoples. Although, to be honest, they have quite a loose definition of the word ‘borrow’: it really includes everything from "I’ll bring it back in minute" through to "since I’ve shot you, you won’t be needing this anymore".
Casimir and Bulbous survey the Yoruks as they perform feats of skill.

'They do at least seem enthusiastic, my lord', says Bulbous, hopefully.
Casimir shrugs. 'Hmmm, well it's probably more like desperation - but it’ll do for my purposes'.