Hi 
How can I stop this? When I build a base in AI borders, "war were declaired". If they do it to me, they can avoid all negative consequences. Last game I played, I lost a bunch of good resources to AI bases built right in the heart of my territory. These resources were being worked by a base within two squares of them.
As an experiment, I built another base nearby, in land that had been mine before the offending AI base arrived, and bingo, war.
Seems to be one rule for the AI, and a different rule for players. Any AI building a base on my land should constitute an act of war. If not, I have to declare war instead, and then I am seen by the game as the aggressor.
So how do I stop the AI from ignoring my borders?

How can I stop this? When I build a base in AI borders, "war were declaired". If they do it to me, they can avoid all negative consequences. Last game I played, I lost a bunch of good resources to AI bases built right in the heart of my territory. These resources were being worked by a base within two squares of them.
As an experiment, I built another base nearby, in land that had been mine before the offending AI base arrived, and bingo, war.
Seems to be one rule for the AI, and a different rule for players. Any AI building a base on my land should constitute an act of war. If not, I have to declare war instead, and then I am seen by the game as the aggressor.
So how do I stop the AI from ignoring my borders?