In my last game on prince I was hannibal and well ahead heading for a space victory. My ship was to launch in about 5 turns while only one other civ even had rocketry. Then something inexplicable happened: Mansa musa of all people dows me and takes this wasteland city I had settled on his continent just to grab silver for the corporation hostile takeover quest.
Then monty ups and dows me with a stack of about 6 gallons and 6 caravels. I had no navy, since I'd been peacefully building spaceships and had mech infantry while my opponents were using rifles, I figured I was safe, but monty can be dumb. But instead of landing his stack of cats and maces (he was the most backward civ on the map) next to my city, he hightails it all the way around my continent to a small city I had settled as a bridge in a pennisula between my empire so I could pass through without open borders with the ottomans to the north. He takes that city, I have the units to take it back but ended the war with the UN (I was UN leader).
So now I'm pissed, I have 23k gold and launch my spaceship. I buy nukes, build them one turn then buy them and it costs about 1.5k per so as soon as I am able to dow monty again I nuke his capitol and about 5 other cities, then nuke every single mansa city. Dropped each's score about 200 points, then I won space before they could do anything, not that they could retaliate anyway.