Inside the hospital treating Afghan troops
14 June 2013 Last updated at 09:31 BST
Afghan government forces are next week to take the lead in combat operations across the whole country, for the first time since the fall of the Taliban 12 years ago.
It will mark a significant milestone on the road to the eventual withdrawal of Nato forces at the end of next year.
But as Afghan troops start to do the bulk of the fighting they are paying a heavy price.
David Loyn reports.