That was the missing key... you cannot allow any face-to-face contact upon closing the city status screen. The human and not the AI must initiate the contact, which is "Enough of your useless chatter. Now begone". Then the human may approach the AI again, whilst keeping a state of war. This is now confirmed to work in both MGE and Classic . Thanks funxus and Andu. Just for simpletons like me, here is a recap of the exact steps for Andu's "Emissary Ploy": 1. Possess the UN. 2. Capture an AI city. 3. The plundered gold comment is now onscreen (close the popup). 4. The City Status screen pops up (close it). 5. Immediately after closing the screen, press F3. (".... chatter. Now begone!"). 6. Now you may haev face-to-face contact with no interference.... attack, capture, or whatever you want. This sequence of events is the same for both 2.42 and 5.4.0f (Classic and MGE). Would you like to add it to the GOTM Techniques thread, Andu? It is an allowed technique by default. For those that hate senate interference in a democracy, this pretty much overcomes that . After all these years of developing unit maneuvers to wipe out civs in one turn (or subvert the remaining cities), I'll probably continue doing it "the hard way" though! Thanks, Andu for figuring this out!