The Sarbadars (from Persian: سربدار sarbadār, "head on gallows"; also known as Sarbedaran سربداران) were a mixture of religious dervishes and secular rulers that came to rule over part of western Khurasan in the midst of the disintegration of the Mongol Ilkhanate in the mid-14th century (established in 1337). Centered in their capital of Sabzavar, they continued their reign until Khwaja 'Ali-yi Mu'ayyad submitted to Timur in 1381, and were one of the few groups that managed to mostly avoid Timur's famous brutality. Sheikh Khalifa Mazandarani one of the leaders of this movement was indeed a great scholar. In modern Iranian history the term "Sarbedars" was used by the Union of Iranian Communists (Sarbedaran) during their armed uprising in January 1982 in Amol against the Iranian regime.
The Sarbadar state was marked by divisions in religious belief during its existence. Its rulers were Shi'i, though often Sunnis claimed leadership among the people with the support of Ilkhanid rulers. The leadership of the Shi'is stemmed chiefly from the charisma of Sheikh Khalifa; a scholar from Mazandaran, the shaikh had arrived in Khurasan some years before the founding of the Sarbadar state and was subsequently murdered by Sunnis. His successor, Hasan Juri, established the former's practices in the Sarbadar state. The followers of these practices were known as "Sabzavaris" after the city. The Sabzavaris, however, were divided; among their number were moderate Shi'is who were often at odds with the dervishes, adherents of a mystic ideology. The capital city of Sabzavar likely had a large Shi'ite community, but as the Sarbadars conquered the neighboring territory, they acquired cities with Sunni populations.