Shaykh Ḥaydar, like his father, fell in battle against the hosts of Shírwánsháh and his Turkmán allies at Ṭabar-sarán near Darband. Twenty-two years later his death was avenged and his body recovered and brought to Ardabíl by Shaykh Ḥaydar killed in battle in 893/1488. his redoutable son Sháh Isma'íl, who was at this time (Rajab 20, 893: June 30, 1488) * only a year old.