i have a game going where im on an island with the byzantines and have explored the entire island. the byzantines have no local iron(used control/shift n to make sure) but have pikeman in most of their cities. they obviously traded for it, but how do i know if they still have it? when i go into the trading screen with them, it does not say they have iron. so, do resources that are traded to an ai show up in the trading screen or not? or has this deal probably expired?