After losing territory

Country Convenience Attacks 

After losing territory and power in Syria and Iraq, the Islamic State militant group (ISIS) is outsourcing its deadly attacks on the U.S.-backed government in Afghanistan to local splinter groups, including the Pakistani Taliban, because it lacks manpower.
Claiming responsibility for a string of high-profile attacks in the country in recent months, particularly in Kabul, ISIS is vying with the more established Taliban and Al-Qaeda in the Indian Subcontinent (AQIS) for dominance in Afghanistan.
However, a recent U.N. report has said that while the leaders of the groups remain in open competition for the hearts and minds of Afghanistan’s Islamists, ISIS tends to enlist “partners of convenience” and “outsources” attacks to other local splinter groups, including the Tehrik-e Taliban Pakistan, an umbrella group for branches of the Pakistani Taliban.

 http://www.newsweek.com/down-its-luck-syria-and-iraq-isis-outsources-terror-attacks-pakistani-taliban-650926