Chaos Recruit (X) is a certain ability some units have, such as those belonging to EA Oceania or EA Yomi, that rebates a cost of the gold of the unit the turn after you buy the unit, based on the unrest, and turmoil/order scales in the province. The Cost refunded is the value given by Chaos Recruit, and is multiplied by each turmoil scale, or by every 15 points of unrest, whichever is higher, to a maximum of 3(x) where x is the value given by Chaos Recruit. The amount you get back is theoretically based off your scales and unrest for the turn that the unit was recruited, not the turn you get the gold back, due to how the Turn Order works.
So a Chaos Recruit 10 unit recruited in a turmoil 3 province will give you 30 gold next turn. Likewise, that same unit will yield the same 30 gold in an Order 3 province with unrest 45+. A unit recruited in an order 1 province gives you nothing back, but a unit recruited in a turmoil 3 province with 0 unrest gives you the full rebate. As well, a Chaos Recruit 10 unit recruited in a turmoil 3 province that changes to an order 3 province (somehow) next turn should give you the full 30 gold.
This does not decrease the cost of the upkeep of the unit.