Is all of afghanistan really worth fighting over? I don't think so. Protect only the things you want out of the place, and shoot anyone that tries to get into that area. There is no good reason they would be there
Fighting over a territory that isn't "yours" and that you don't even intend to annex is... really stupid.

Please give me a home where cloud buffalo roam
Where the dear and the strangers can play
Where sometimes is heard a discouraging word
But the skies are not stormy all day