Ok to ge tthis thread back on track, because if it continues the way it is it will be locked, there is a slave POP, not there is no international slave trade (that is outlawed) and the government does not go into the slave business.
But how slaves migration will work? Slaves are not free, they can't just go somewhere where the living is good and a goldrush started. However they will probably move somewhere where their masters will go.
So do slaves have some special migration algorythm?