Something there is that doesn't love a wall,
That sends the frozen-ground-swell under it,
And spills the upper boulders in the sun
I'm a bigot, but for the Left,
Annie Hall (1977)
Ain't nothin' gonna break-a my stride
Nobody gonna slow me down, oh no
I got to keep on movin'
--Break My Stride,
It seems just yesterday that the Free World celebrated the fall of the Berlin Wall -- that the iconic symbol of the Iron Curtain -- and with it, the collapse of the evil empire. Sort of.
Today, the United States contemplates building a wall between itself and Mexico at an estimated cost of $18 billion (which means that it will actually cost $65 billion, with mandatory cost overruns, before it is functional.) Ranger will now consider the fence in simple military terms.
The Fence will be an obstacle. The first rule of employing an obstacle is that it is useless unless covered by fire. This means direct or indirect fire must be implemented in a complete defensive fire plan.
Lacking fire, an obstacle is a waste of effort, time and assets. For the breacher, it is a like a bolus of material, an irritation, to be summited.
The U.S. must be willing to treat U.S. soil as an exclusion zone, and stand ready to implement deadly force to achieve the hoped-for goal of the fence, which would be as an adjutant to enforcing immigration policy.
But a fence is just a fence, an obstacle on the course, unless it is covered by fire. This point is offered for consideration, as it is usually omitted when considering the simple architecture of the thing.
An effective fence implies more than its mere physicality.