Emperor, Large, Continents
I can't remember who I was playing with, but I DO remember who I was playing AGAINST: The Celts. I had built up a huge nation and had already wiped out the Arabs, and the Celts were on my very large landmass and just to their south was Netherlands and Inca. Upon discovery of Replaceable Parts, I find that I have no rubber (very rare really...I think I always have rubber). Celts had FOUR! Once getting oil, I had 4 of these

and traded with the Mayans on the other side of the globe for some rubber. Well, the Celts didn't like this, and went to war with me. It was a defensive war, since neither of us had Tanks or Bombers yet but we did have Infantry and Guerillas. I managed to take a few of his cities, and also drew the Dutch and Incans into this war against him. That wasn't too smart, as he took out both of them and became even LARGER.
Once peace was declared and I had 5 of his cities in my possession, I began stockpiling military at the border because we all know that there are two main World Wars in just about every big game. I preceded without hesitation or interruption until well after Mech Infantry, MA, and Nukes were available. Every nation was happy with me, except the Celts. Upon building the Space Program, he must have become very nervous of me building a spaceship. By this time, I had roughly 15 ICBM's and 10 subs with nukes in them.
He declares. Somehow, he managed to manipulate my naval blockade and slipped transports to my NORTHERN border and attacked a very nice city up there with his Battleships first and then his Marines finished it off. Instead of capturing it, he razed it. This city had the Colussus and Great Lighthouse in it (extinct Wonders, but create for commerce). I was piping mad. So I turn the key. I nuke his 10 best cities including his capital, keeping 5 ICBM's in reserve. I steal his military plans, find a HUGE SOD ready to invade my borders next turn, and use a tactical nuke on that stack.
I managed to cut off all his resources. I fully expected him to send some units into my territory to capture workers and pillage irrigation like the AI usually does, but instead, he launches TWELVE nukes at me! Ouch! Luckily, that was all he had, and he was importing uranium, and I managed to cancel that with an Embargo with the Sumarians.
Geeze, that was a long story! Case in point: The AI does use nukes!
