After the Battle of Ankara, Mustafa Celebi (known as Duzmece Mustafa) went to Samarkand with Timur. Following the death of Timur, Mustafa had returned to Anatolia. He was planning to ascend to the throne by dethroning Celebi Mehmet. He co-operated with the Prince of Wallachia and revolted in Salonica. Afterwards, he escaped to the Byzantine Empire but Celebi Mehmet gave money to Byzantine Empire and imprisoned him.

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