I just wanted to pose a few questions about Vassals. 1. When you have the opportunity to make a CPU player a vassal of yours, what are the pros and cons of accepting? 2. If a CPU civ becomes your vassal, and things go poorly, can you attack them later on (obviously with relations penalties) or are you prohibited from ever warring with them once they become your vassal? 3. I know (or at least think) that Vassals are only responsible for providing resources (not cities or techs). To follow that up, (a) does that include gold? and (b) are the resources ever "red" in the menu, meaning that you cannot even bring that up during the discussion? If the latter is the case, does that mean you only have (potentially) two options: (1) try to better your relations, or (2) (if possible) attack them and take over their cities?