The Berlin Wall was erected in 1961 by the East German Communist regime to prevent its citizens from fleeing the repressive Soviet-led government. The concrete barrier was constructed was constructed with 45,000 separate sections of reinforced concrete, each 3.6 metros (12 ft) high and 1.2 metros (3.9 ft) wide, and cost DDM 16,155,000 or about US$3,638,000 according to Wikipedia.
In 1982 I visited Berlin. The Wall or Antifaschistischer Schutzwall was a must-see for tourists. Henri Flesh, a Paris DJ, and I stood atop a viewing platform. A death zone lay beyond the wall brimming with mines and surveyed by assassin snipers. In 1982 one person was killed by the border guards. His name was Lothar Fritz Freie. He was shot in a restricted area.
The Berlin Wall fell with the collapse of the USSR in 1989, however in recent years the Zionist government of Israel has built a greater wall to protect themselves from the wrath of the Palestinians. The West Bank Barrier is much taller and thicker than the Berlin Wall. Its path cuts across the Occupied Territories with the express purpose of seizing more land for the creation of settlements for right-wing settlers dedicated to the expulsion or extermination of any non-Zionist population.
The British built a similar wall in the Lost Provinces on Ireland.
They failed to prevent the rise of the IRA.
Same as the wall failed for the USSR or the Border Patrol on the Mexican border.
People flow like water and freedom of movement is the way of the world.
Free Palestine. Free Ulster. Free the world.