So in my first Civ 5 game as Alexander playing on a standard Earth map, I managed to form an empire on lands occupied by modern-day Russia (except east Siberia though). To achieve this, I had to puppet two city states in the process, but it was done around 0 BC and it's now 1000 years later. Mind you that throughout this whole time I never insulted nor demanded anything from the AI nations. All the sudden, everyone declared war on me right after my golden age started, calling me a warmonger, even my friend United States who controls India. Should I consider this as good AI or just the AI being plain aggressive? So there's Catherine from China, Caesar from Africa, Washington from India, and the Persian King from western Europe all attacking me from all sides. I have to say the AI is indeed dumb in fighting tactically, I was able to hold them off for 20 turns before being finally outmanned and losing my first precious luxury/iron city. Then I had to leave it at that and peaced with Catherine. But Caesar had amassed a huge army (about 10 units) from Africa and MY OH MY, the way he placed his armies....melee in front, catapults and archers in the back, supported by calvary unit in the flank...and MOST AMAZING OF ALL, they all march in unison, looks like it's being controlled by Sid Meier himself. And it has just taken down my primary citadel/chokepoint city and marching straight to my capital. I can't believe this is happening. I was #1 in everything, had almost all luxury resources and plenty of iron mines. And I'm now losing because either game is bugged not to let me have any ally, or I have done something wrong.... Is it possible to ally with an AI if you're a strong nation?