I had established several trade routes with another player when both of us agreed to a peace treaty. However, the deteriorating political situation has forced both of us to cancel the treaty and declare war on each other.
Now I want to place a trade embargo on that player, and cancel the trade routes to that player's cities because the trade routes are helping the enemy reach technology and financial goals (both of which I find unacceptable). I can comfortably survive without those problematic trade routes, but I've determined that the enemy cannot survive without them.
But how can I cancel trade routes that go to enemy cities?
I know that I can try to find better trade routes in hopes of replacing the problematic trade routes, but ...
- The replacement of old trade routes is not guaranteed as new trade routes have to yield more trade points in order to replace old trade routes.
- The seas are now infested with enemy battleships, cruisers, submarines and aircraft carriers, making it extremely impractical to establish long-distance trade routes that can replace the problematic trade routes.