The Drow and the Dvergar are introduced. Consider them as AI factions located in the middle of the map which will randomly spawn armies attacking adjacent Regions. Nobody knows what their agenda is...Can they be bribed? Can they be diplomatically approached? What do they want?
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The spawn time and number of armies is random.
They are not as powerful as the Capital Armies, and it is possible to be destroyed. At the moment, the level of Regional Defenses will affect the probability of a mercenary army to get destroyed. For every 5% of Defenses, there is a 2% probability (Eg. 100% Defenses = 40% probability that the mercenary army gets destroyed) that the mercenary army won't succeed raiding the Region and gets destroyed.
If a mercenary army is successful, then the Raid is successful and both Factions lose CP (equally divided) in that Region. If the owner of the Region has Defenses, then it will lose less CP due to Defenses...
If a mercenary army gets destroyed, then there is no CP loss but the Regional Defenses will get damaged in the process.
If both Factions have less than 10% in a Region, then the Region becomes neutral.