Colby College. History Dept.
This article focuses on the point at which the slave soldiers of al-Muʿtaṣim (r. a.h. 218–227/833–842 c.e.) rose to the political forefront and came to dominate the holder of the Caliphal seat. It is a study of the mechanisms by which the center of the state, and more specifically the Caliph, came to be their captives.
Turner, John P., "The Death of al-ʿAbbās b. al-Maʾmūn and a “Thwarted” Coup d’État" (2013). Faculty Scholarship. 68.