[7][6][4][8][9] Another half-brother, Ughurlu Muhammad, son of Jan Khatun, escaped to Constantinople, to the court of the Ottoman Sultan Mehmed II, where he married his daughter Gevherhan Hatun.

[13] In 1480, Qaitbay, the Mamluk sultan of Egypt, sent an army under his Pecheneg commander Yashbak al-Zahiri to invade Diyar Bakr.

The two forces clashed in November of the same year, which resulted in an Aq Qoyunlu triumph and capture of Yashbak al-Zahiri, who was executed a few days later.

In the same year, Ya'qub's forces defeated and killed Balish Beg, the commander-in-chief of Syria, who had attempted to conquer Diyar Bakr.

The Encyclopaedia Islamica considers the truthness of his claim uncertain, stating that; "It must be reiterated that his information on the impact of these reforms mainly refers to Fars, however it is virtually the only contemporary source on the topic and therefore central to any understanding of it.

"[13] The qadi (chief judge) of Fars, Jalal al-Din Davani (died 1502), also opposed the reforms of Ya'qub, which worsened their relations.

[14][15] Together with Abu-Yazid al-Davani and Maulana Muhammad al-Muhyavi, Davani sent letters to Qazi Isa Savaji to protest these reforms.

[13] The Aq Qoyunlu displayed their legitimacy by rebuilding ruined Ilkhanate buildings, including the palace of Ujan near Tabriz, originally founded by Ghazan (r. 1295–1304).

Aq Qoyunlu historiography represents Ya'qub hunting around the palace of Ujan in the same manner as the Sasanian monarch Bahram V (r. 420–438).