My Egypt v. England. My HA takes his HA. He starts asking for diplomacy. I ignore because it's usually about trading techs and I'm not interested right now. He sends me a message that I'm cheating. He says, "I've got the great wall, you have to accept peace." So I'm supposed to keep track of whether someone has the great wall or I'm cheating? If we are at peace and someone gets the great wall, then fine, I can accept that. But if we are at war, I want to play my own game. I understand the game is glitchy, but I didn't do anything to create that glitch.
Admittedly, I don't have a lot of experience with the great wall, so I'd appreciate some input.