The apocalyptic event of when, a government and its leaders intentionally decide not to defend and or protect a line separating two political or geographical areas, especially countries, which creates an unsupervised zone of unlimited depravity, illegal immigration, and criminal enterprise.
The 'Bordergeddon' that the current administration caused by intentionally violating the US Constitution and not protecting the country's southern borders was a cataclysmic event that was not easily fixed.