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SpokenTruth said:
EricHiggin said:

Then why the great wall of China? Why the Berlin wall?

The Great Wall of China was built to keep out invading armies.  Not (drug) smugglers.

 

The Berlin Wall was the most heavily guarded fortification in human history. 

Are you really expecting 2,000 miles of this?

 

Because that would push the cost to damn near $500 billion.

Also worth noting that the Wall of China was ineffective. The Huns invaded the country specifically because they also thought that's enough, and didn't man the walls and towers with enough guards. Result: The Huns entered China through a door the Chinese forgot to close and once hey found out that the Huns entered there they were already dozens of miles inlands.

Another example: The Limes, the roman border wall in between the Rhine and Danube rivers, stood for centuries. But once the roman empire couldn't afford the guards there anymore (Long story short, the western roman empire had hyperinflation and already reduced their equipment value as it got too expensive. The legionaries got a 300% pay raise a couple years before the wall fell, but that practically bankrupted the already fragile economy of western roman empire), the vandals, goths and allamans quickly got through.

As you can see, history shows that a wall alone is ineffective. The wall needs to be both guarded and patrolled 24/7 to be really worthwhile, otherwise those who really want to get past it (like smugglers) will find a way.

@bolded: Considering the length of the border and the amount of fortifications (and some are not shown in those diagrams, like the minefield, 5 Trillion would probably closer to the truth. And 5 Million Border guards, give or take.

Last edited by Bofferbrauer2 - on 15 March 2019