Some events in BtS have a conclusion of "provide all current and future naval units with Combat I" and then only give your current units Combat I. How could I change my files so that a building (e.g. Harbor) actually gives a certain promotion after an event fires? I can see how to give commerce and yield bonuses to buildings from events, but not promotions. Is it even possible? Maybe via python if not XML? I guess I could code it so that an event create a special building which has this ability, but that is quite a bit of hassle and would only work for existing cities, not all new cities as well... Thanks for any pointers!