New campaign movement modifiers through different types of terrain. Better Building effects as they matter now.Better technology effect bonuses. Religion has a bigger impact on public order and diplomatic relations. More defensive deployables in Fortified stance. Better balance of field battles vs small settlement battles. Army reinforcement range has been increased by 50%. Ai should build bigger and better armies with better mix of units and construct buildings more.
Christian faction will fight each other more and Islamic factions will fight each other more. More diplomatic activity.Re balance of relations so more inner faction fighting less west vs east. Diplomatic behaviors changes are that factions allied with you will be more likely to make treaties with your allies too. More field battles and tougher settlements. Ai factions will defend regions and capitals better and help aliies more. New Campaign Ai behaviors that includes more AGGRESSIVE and EXPANSIONIST factions that will ATTACK!.