Repression / Replacement
It is always talked about fighting crime but it is clear that crime cannot really be fought against. Crime, for example is contained, controlled, or repressed.
For the Border guard, this - probably a neighboring area - will be heavily loaded.
This also happens when a whole borderline is shut off completely. The people who really want to be in the country then attempt to use official border crossings or avoid detours that pass through the neighboring countries.
1. Not high secured border
2. High secured part of the border
3. Almost closed border