Sarbadars
The Sarbadars 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. 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.