borderization

noun2

1. •
   The establishment or demarcation of a border; or the process of doing so by militarizing or otherwise fortifying it, often to alter its status or restrict movement.

   • the borderization of states
2. •
   The gradual and nefarious encroachment of one state's control into a disputed or neighboring territory by means of erecting illegitimate infrastructure, military presence, or administrative measures such as detainment.

   • Russia's borderization of Georgia