[CRedskinsRule]

I seriously don't understand the narrative that a wall would not make a difference. I can give examples from ancient times to modern day eastern European countries who have greatly reduced refugees with border walls. Can anyone cite an example of a wall that failed without a foreign invading army involved?

Or would anyone want to live next to a maximum security prison that had no physical walls and just video surveillance?

There are more than enough examples of working border walls throughout history. I am just interested in examples where a wall did not significantly reduce external intrusions into a country. (Again not talking about foreign army invasions)