Ahh, just the topic i was looking for. (
more info in this thread)
And again, just when i thought i knew this game inside-out
I've had this happen to me 3 times in the last month, but only once per game.
All 3 times, the cities were on different continents.
The first two times (on civnet) the cities were pretty close to mine, but the most recent time (with civ dos) happened with a city on the other side of the world - and not even the closest city belonging to that civilisation.
In civnet, there were a series of 3 messages:
1. "citizens of X admire the prosperity of Y"
2a. "rioting in X, citizens demand lower taxes" (first game - 1874)
2b. "scandal in X, citizens demand temple" (second game - 1952)
3. "Xians rebel, civil war in X. Yian influence suspected"
I played all three games pretty much the same, destroyed the opponents on my island, and didn't contact the anyone else. I should have paid attention to if i had contacted the civs whose cities.
I was the strongest, largest, richest civ, so that doesn't really narrow it down why the defected.
I guess it's just something that happens when you're peaceful and not taking over cities.
In the first game, my city Y wasn't particularly large, only 13, not my capital, and it was the second closest city to theirs, their city wasn't their smallest.
In the second, their city that turned wasn't the closest to mine either, but i think it was their smallest.
I had not noticed that those cities were in revolt, next time it happens, i'll restore the autosave and get a definite answer to that question.
I didn't really take notes on the civ dos game.
Very interesting that it has happened in unexplored areas!