"You shoot them. Remember as I've said in earlier posts the mines are in addition to increased border patrols."
If you're mounting enough patrols to prevent the mines from being stolen from a 19,000-mile-long minefield, then you don't need the mines anyway.
"Remember this is war."
You first. I remember Vietnam; it's rather obvious that you do not wish to.
I don't want to engage in tactical game of oneupmanship but since 'Nam we've engineered UAVs that can patrol a specified area and deliver firepower on a target with amazing accuracy. Also UAVs don't take potty breaks or smoke breaks. We have the technology and trust me it's lethal.