Ender Wiggin
Chieftain
Can you destroy a city at will? Or does the population have to drop to 0?

You can destroy a city that you own by building an engineer in a size one city (except in Chieftian, which won't allow you to destroy a size 1 city that way). BTW, Spies/dips can take cites, but a size 1 city will remain after bribe/subvert. In normal gameplay, you cannot have a size 0 city. But a size 0 city is indeed possible, with "help".Can you destroy a city at will? Or does the population have to drop to 0?
If you mean when the unit attacks a defended city, then yes... walls prevent population loss when any city defender loses a battle.while on the topic of destroying cities, i have a question. Sometimes when units attack and win, the population goes down by one, if i have a city wall, does that prevent this??
I won't say "never" build the Great Wall, but at higher difficulty levels on larger maps, it is rarely possible to build everything, esp. at the same time. You'll need to make choices... and as for me personally, I very rarely build the Great Wall anymore, unless it is late game when I just want the 20 points for an expired wonder.okay, now i understand, i should probably build city walls then or the Great wall.