Conversation so far:
What happened with Gulbuddin Hekmatyar in 2008?
In May 2008, the Jamestown Foundation reported Gulbuddin Hekmatyar's HIG group had recently reemerged as an aggressive militant group, claiming responsibility for many bloody attacks against Coalition forces.

Question: Why had they re-emerged?
Self-contained rewrite: Why had Gulbuddin Hekmatyar' HIG group re-emerged in 2008?