Does the A.I ever declare war for the sole purpose of breaking a deal?

[Blaupanzer]

In response to the original question, the AI will declare war on a civilizatioin if it is no longer capable of fulfilling a per turn deal with it. This can be because the oil source or whatever went away. I'm not sure how the AI civ factors in its attitude toward you if you now have the output of its only resource and it wants that too, like oil. Suspect that situation slides you down the scale toward furious with that AI civ, but I don't know that for certain.

Separately, landing troops on your soil from a boat/ship is not an automatic declaration of war. You don't lose access to resources in the squares unless the landing force is at war, so you can check if you want to. Next time this happens, try negotiating an ROP agreement. If the AI is about to go to war, it won't give you that. Those troops could have been headed overland to somewhere else, although that seems a little far-fetched if you owned the whole continent.

[bongo]

Even if it is really annoying when the AI performs his backstabbing act I'm also a bit impressed when he does. Makes him more human kind of Also makes me angry, too bad there are not an option to demand compensation for broken deals. All that's left is to destroy him

I just sold the russians metallurgy for 70 gold + 17 gpt and two lux. A few turns later he landed troops on my territory...there is absolutely no way I will grant him peace until he gives me a serious offer(some cities, gpt and lux) or have taken it by force.

[cumi]

Interesting: I played yesterday (just for fun, didn't even finished it). At the beginning (REX-ing phase) the AI entered into my territory with a worrior/settler combo. I told him to leave, but the AI declared war instead of it.

Normally I don't care, when the AI enters with one or two unit, althougth sometimes I have the feeling the AI is provocating me, especially with ships in the later game. It is entering and leaving in the same turn, but sometimes it forgets itself inside of my borders.

When a settler/mil. unit combo enters into my land, I tell them immedietly to leave - I don't want a city somewhere in "my" land, just because there is a place for it (my cities didn't expanden enough yet)...

[bongo]

Sometimes I can predict where his settler/mil.unit are going. If he's going to build a city in an open spot surrounded by my borders I will let him do so if that city is going to CF to me later anyway(if I am or are going to be culturally stronger). The result, no war and a ready-built city

[cumi]

Originally posted by bongo
Sometimes I can predict where his settler/mil.unit are going. If he's going to build a city in an open spot surrounded by my borders I will let him do so if that city is going to CF to me later anyway(if I am or are going to be culturally stronger). The result, no war and a ready-built city

That's a good strategy. But, sometimes I want that spot ASAP and the reason, that it's stil empty is, that other locations had higher priority for me... Or simply, I don't like to leave huge empty terrain in my empire. I am not jumping on luxuries or resources, I am expandig continously. Maybe that isn't a good approch...

I also don't really care about locations for example on the north (snow, coast, no whale, no fish) or south where I would never "waste" a settler... If the AI fills that territory, no problem. Later it will CF anyway. If not, also good.