I was playing Chieftain Level as Germany on a standard world map with correct starting positions. I was way ahead in techs in fact I was dominating the game. My military was far superior to anything anyone else had because most of them didnt have the resources for more advanced units and I wouldnt trade with them because they had nothing of value I needed. Before the middle ages, England, France, Rome and Greece had been eliminated. China was the next in power but I was way ahead of it. Then in the late 1900s China gives me this threat to sell them Nationalism or else. I told whats his name where he could stick it. I knew his threat was meaningless because he was so far behind in techs. The next thing I know, China declares war and two turns later there is a stack of ten mounted warriors knocking on my door. I might add that they had several other countries to pass through before they could reach me. I was laughing because I had five panzers waiting for them. They managed to take out two then another stack of warriors came in and finished off the other three and then took the city. They also managed to completely heal themselves on the next turn, and they were not even in their own land. I know they did not have battlefield medicine. They also seemed to know exactly where to strike my cities at their weakest. Now that puzzles me because they did not have espionage and if they did, they did not have enough gold to even use it. I eventually won the game as a cultural win but it still irks me that the AI can cheat like that. I mean mounted warriors against panzers, come on! I declared a cease-fire with them after losing two cities and a few turns later I discovered space flight. I was going to leave a little surprise at Beijings front door to teach them a lesson about humility, but I could not build tactical nukes even though I had the necessary techs and resources. Whats with that?