…brought him into conflict with Yaʿqūb, the Ak Koyunlu ruler who was also Ḥaydar’s brother-in-law, with the result that the alliance between the order and that dynasty was weakened. Ḥaydar was killed in battle by Ak Koyunlu troops while he was leading an expedition to Circassian territory. Ḥaydar’s major achievement…
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