After the Ankara Battle, the Turkish unity in Anatolia was
desolved and the Ottoman Empire faced with the danger of destruction. The sons of Bayezid I had
began a throne struggle after his death. Thus, the most chaotic interragnum had began in the
Ottoman history. Because of the Byzantine intrigues and
Timurís destruction the civil war had begun among the shehzades. Suleyman Celebi in Edirne,
Isa Celebi in Bursa, Mehmed Celebi in Amasya, and Musa in Balikesir declared their
Mehmed and Musa made an allience, and killed Isa.
Mehmed knew that Suleyman must have been killed too. For this purpose, he sent Musa
against Suleyman to Edirne. Musa had defeated his brother Suleyman and invaded Edirne,
but did not keep his promise and declared himself as the sultan of Edirne. In 1413, Mehmed
defeated Musa and he ended the interregnum.