One thing to go along with the over-all campaign...enslaving is okay but just occupying a captured setlement isn't enough...your best bet would be just to exterminate the population of every settlement you capture so you don't need to go back to that settlement while punching say...Egypt in the face...extermination is the way to go...it's helped a lot and keeps me focused on taking out the next man in line...you can do what you please but this hint might help...good luck everyone