I always had trouble trying to picture an invasion of America across the Southern Border with all the tanks and A-10s we had. Instead, the jugheads put up concertina wire. The number one thing you need to know to make concertina wire effective is that it’s needs to be covered at all times with machinegun fire. If it’s not covered with live fire, it’s useless. You might as well piss a yellow line in the sand.
Put a few claymores in the rolls of wire.