Jamayat-E-Islami, sometimes shortened to Jamiat, is a Muslim political party in Afghanistan. The majority of the party, the oldest Muslim political party in Afghanistan, are ethnic Tajiks of northern and western Afghanistan. It has a communitarian ideology based on Islamic law. During the Soviet-Afghan War and the following Afghan Civil War against the communist government, Jamiat-e Islami was one of the most powerful of the mujahideen groups. Burhanuddin Rabbani led the party from 1968 to 2011, and served as President of the Islamic State of Afghanistan from 1992 to 2001.