The Rashīdī History 5.2

5.2

In the latter part of his life, the remoter tribes of the steppes, displeased with his fondness for towns, separated from him, and acknowledged his second son, Sultan Ahmad, or Alicha Khan, as their Khan—so that the kingdom was again divided into two during his lifetime. He died 892 H. (1487).
Sultan Mahmud Khan, Yunus' eldest son, succeeded his father in Tashkand and as chief of the western tribes. He was defeated by Shaibani Khan in 908 (1502-3), lost Tashkand and Sairam, and was finally put to death by Shaibani in 914 H. (1508-9).
Isan Bugha II., raised to the throne in 832 H. (1429), and through life supported by the eastern Moghuls, died 866 (1462), was succeeded by his son
Dust Muhammad Khan, who ruled in the eastern districts (Uighuristan, etc.), died 873 (1468-9).
Kabak Sultan Oghlan, his son, ruled for a time about Turfan, or Uighuristan, where he was murdered.
Sultan Ahmad Khan, second son of Yunus, governed the eastern Moghuls in Aksu and Uighuristan. He was generally known as Alachi Khan—"the slaughtering Khan." He was bent on making himself absolute ruler of the steppes, destroyed the chiefs, and curtailed the power of many of the tribes. Defeated by Shaibani Khan in 908 (1502-3), he died of grief in 909 (1503-4).