 Involved in the operation were forces of Hekmatyar's Hezb-e Islami Gulbuddin, Abdul Rasul Sayyaf's Ittehad-e Islami and Arab fighters, totalling 10,000 men.The attack began on March 5, 1989, and went well at first for the mujahideen, who captured the Jalalabad airfield before being counterattacked.When government troops started to surrender, however, they, along with unarmed civilians, were tortured and executed by Hekmatyar's and Sayyaf's forces, making the option of surrender impossible for the communists who then fought harder.