The sources are particularly rich in accounts of the Sassanian art of warfare because there existed a substantial military literature, traces of which are found in the ???ah-nama, Denkard 8.26-an abstract of a chapter of the Sassanian Avesta entitled Arte???tarestan warrior code-and in the extracts from the A'in-nama which Ebn Qotayba has preserved in his Oyun al-akhbar and Inostrantsev has expl