thanks for your inputs!
but none of your suggestions help me out, since you both specifically redirect the unit the exact specific region it left. i need a method to recall the left region, similar to the "event response - triggering unit" function, but with the region.
is there possibly a custom script that could help me out?
if there was i could make it like this
Events:
-unit leaves region01
-unit leaves region02
-unit leaves region03
-unit leaves region04
-unit leaves ... (all regions)
Conditions:
-whatever
Actions:
-issue unit order (order move) to random point in region (left region)