Combat AI's fort siege logic could use some work

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alpaca

Even-toed ungulate
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Mar 13, 2007
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I'm sure everyone's seen examples of this by now, but the AI sometimes does really weird moves in order to siege forts without discernible reason.
eu4_2.jpg
For example, Delhi in my current game ran all the way to the Chinese border in order to siege a fort there, bypassing three other forts that would have made a lot more sense to besiege. Now, not only did they waste several months just to walk there (receiving attrition all the while due to tropical territory), but their army is isolated and if I choose to send my armies back, it will be easily shattered. At first, I thought they'd go for my capital in Pegu, which would at least have made a modicum of sense considering the AI puts a lot of weight on capitals in general, but no dice.

Not sure if the AI decided to try to make Hsenwi (my vassal) sign a separate peace, or if this is just random AI stupidity, but I think it would make sense to add some travel time modifiers to the AI's decision about which fort to siege. In almost all cases (unless you're trying to fight some sort of rearguard guerilla action), besieging border forts makes more sense than random ones far away. Also useful would be to make them less likely to move somewhere where they only have a single path back if the enemy has numerical superiority.
 
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