The first feasible location on our side of the border.
A river....fence it a thousand yards back.
A mountain...fence it in reasonable locations.
This would be a true “eminent domain” issue to create a “no man’s land.” Or, for those willing to cooperate, it could be “no man except agriculture or other such use.”
Are you La Raza?
A defacto handing back of territory to Mexico isn’t what most people think of when they think of border security.
Looks like a good place to have a Guard House with a Sentry and live ammo. Iam thinking between that and a rotting bloating corpse of the previous fool that attempted criminal invasion it would be a deterent.