Also if the Iron in question is within the city radius of a city you've already conquered you don't have to worry about keeping it safe from your vassal's culture. And none of the vassals resources are red. (Normally they are if the other civ only has one copy for himself or you wouldn't benefit from the resource.)
Basically whenever capitulation occurs your new vassal has his war/peace adjusted to match the master.
Note this is different than voluntary vassal, in which case the master declares war on whoever the vassal is currently at war with in addition to the new vassal declaring war on whoever the master is currently at war with.
Basically whenever capitulation occurs your new vassal has his war/peace adjusted to match the master.
Note this is different than voluntary vassal, in which case the master declares war on whoever the vassal is currently at war with in addition to the new vassal declaring war on whoever the master is currently at war with.
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