I generated - and yes, I am insane - a 10000 year old 'small' world, with low minimum and maximum temps, so even the grasslands were 'freezing' during summer.
Anyway, in this world a Human race conquered/enslaved an Elven tree city (only four elves stayed, one male, three females O.o. the rest fled into the wilds) and slowly made a regular city from it, and this was within the first Age, I believe.
Thousands of years later, I start an adventurer and decide to become a mass murderer. Well, turns out, I attacked a descendant of the slaves and started a massive battle between Humans (and three or four Elves who stayed true to their masters or something like that...) and Elves in the town. By accident. Didn't notice at first, but once the Spearmaster (who was one of the 'loyalist elves') started stabbing other elves, I quickly figured things out.
But thousands of years of breeding means there were literally hundreds of Elves, but less than fifty Humans. We still pwned.
The highlight of it all? A priestess pwning the Elves with a shoe she had wrestled off an Elf she had killed.
That was the most fun I've had in adventure mode, though.
Er, the part I thought was cool, and never noticed before, is that enslaved Elves will remember what happened thousands of years prior. What was strange is that a lot of them had been born all those years ago too. O.o