[itsthecourier]

a network of tunnels and sensors is easier to defend than a open space exposed position where drones can see you from miles away, I guess that makes tunnels better for defense

[goodmythical]

Given that we have bunker busters that will travel beyond the horizon at hypersonic speeds and bust 200 feet of reinforced concrete...

I don't think any fixed installation is particularly easy to defend?

Also, I'll grant that a drone can see you from miles away, but don't you think any one of a large and growing number of satellites can spot your massive earthworks from tens and hundreds of miles away for the months or years it takes you to construct?

[jvanderbot]

Given that we have nuclear weapons why bother making anything?

[marcosdumay]

The Russian invasion of Ukraine has been going the other way around entirely.

It's attackers that can't defend against anything.

[stvltvs]

Makes me think the noble houses of Westeros should have dug tunnels to foil the Targaryen dragon advantage.

[8note]

they did - that's why dorne was never conquered