I have seen a nuclear war several times, but the worse one was when I was Russian, and I the nuke secret stolen from me by the Egyptians, who controlled all of Africa, and they nuked the United States. I gave the nuke power to the Americans hoping they'd use it against the Egyptians, but instead, I lost York (the English city) to the bastards.
Major pain in the ass. That was the worse scenario of the game, because after that incident the Indians stole nuke power from the Egyptians, and we had our own little war in Vietnam/China.