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				 Re: defending your empire\'s borders: what do you do? 
 --The AI never really figures out mines.
 --Look to colonize areas of the map with logical chokepoints, and work to garrison each point.  Resist colonizing what you can't defend.
 
 --You cannot defend everything.
 
 --Always stay on the offensive in some way.  Give your foe something to worry about.  Wage war at the economic level.
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