De Administrando Imperio

De Administrando Imperio is an interesting document. Written by or under the auspices of Constantine VII for his son, it provides a Byzantine imperial perspective on the Empire's foreign policy and how to navigate its sometimes warring and belligerent subjects and neighboring polities. Various peoples, such as Pechenegs, Chazars, Turks, Franks, Bulgars, Slavs, Russians, Arabs and other peoples are the subject of several short chapters on the history of Byzantine relations with said peoples and the foreign policy of the Empire with regard to said peoples. Byzantine diplomacy and clever use of groups like the Pechenegs as a buffer helped to keep the Empire afloat during this era. For instance, securing the friendship of the Pechenegs helped protect the Byzantines from hostile peoples. Part of the Empire's strength and longevity was undoubtedly due to this skillful interaction with various "barbarian" peoples and enemies along the frontiers, using one group against the other or as a buffer. In addition, cultural diplomacy and the use of religion was similarly important, converting groups like the Slavs to Eastern Christianity or bestowing Roman gifts, titles, or houses in Constantinople for vassal or tributary rulers. The Arabs and the threat of Islam is also a subject of chapters, particularly the conflicts with the Abbasids and Ummayads before them, as well as the Islamic attacks on Cyprus, Italy, Anatolia, or the Arab sieges of Constantinople. Muhammad, according to Constantine VII, was an epileptic (an idea borrowed from Theophanes the Confessor) who successfully established a false religion. In addition,  Constantine VII's text makes a reference to black slaves who were paid to the Byzantine Empire under Justinian II, in a treaty with Abimelech. Sadly, there is no other mention of blacks or to sub-Saharan Africans...