What about building strongholds a long the Afghan Border every 100km maned by a FC-Brigade, than build stronghold for a company size maned by a Company, than build every 10km a post manned by a platoon, every post is connect via road, every Brigade stronghold has Tanks,Artillery and a Helipad. All post can communicate with each other and call for Artillery and Air strikes. So 80-90 of the movement can be controlled by this Border patrolls and posts, additionals to this, we need a Border Wall etc.