Quote:
Originally Posted by RogerBW
The potential for espionage seems tremendous.
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Never mind that, the potential for invasion is tremendous.
You might have a path to a place that you thought was friendly, and you might find that useful for, say, trade across a fiercely inhospitable region, say tall trackless mountains with wolves and constant bad weather. Now the enemies of your trade partners over there have conquered and taken over that place. Normally the inhospitable region would help protect you from invasion, but... have a look down that corridor for me, please, will you? Nobody's coming along, right?