Islamic Society. Founded in 1967 by Burhanuddin Rabbani. Ethnically Tajik government officially recognized by most governments even after the Taliban took control of Afghanistan. Major figures included the official leader of the Northern Alliance, ousted president Burhanuddin Rabbani, and its military leader, General Muhammad Fahim Khan. Primarily composed of northern (non-Pashtun) membership. Supported by Pakistan and Arab states, it operated mainly in the Panjsher Valley under commanders such as Ahmad Shah Masud, who commanded a force of twenty thousand fighters.