@anderssen saidGenius!
Landmines.
Problem solved.
Q1. Where would you put them?
Q2. What would be the cost?
@wolfgang59 saidIt would have to be about six times longer than the English Channel.
A motte would be more tactical.
@athousandyoung saidYou are thinking of a moat.
It would have to be about six times longer than the English Channel.
A motte is a raised mound of earth with a defensive ditch and/or defensive fence.
@wolfgang59 saidEither way it has to cover the 2000 mile border.
You are thinking of a moat.
A motte is a raised mound of earth with a defensive ditch and/or defensive fence.