Mehmed I Çelebi (nicknamed Kirisci, the Executioner)
was one of the sons of sultanBeyazid I of the Ottoman
Empire. When Timur Lenk
defeated the Ottomans in the Battle
of Ankara a civil war broke out in the empire, called the Ottoman
Interregnum. Mehmed gained some lands in Anatolia, which at the time gave
him access to the largest source of manpower in the Ottoman lands. Mehmed supported
his brother Musa in the overthrow and murder of their eldest sibling, Emir Sulaiman
of
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Roumelia in 1410. When Musa's harsh and arbitrary rule made enemies at home
as well as abroad, Mehmed made an alliance with the Byzantine Emperor Manuel
II. With access to the Dardanelles, Mehmed quickly overran Thrace and had Musa
killed. When Mehmed stood as victor in 1413
he crowned himself as sultan in Adrianople
(Edirne). He restored the
empire, moved the capitol from Bursa
to Adrianople and conquered
parts of Albania, the
Turkish emirate Candar
and the Christian
Kingdom of Cilicia. Howvere,
as part of hs 1410/1411 alliance, Mehmed recognized the Byzantine Emperor as
his "father and overlord" and remained loyal to this anomoly - which must count
as the last diplomatic triumph of the Eastern Roman Empire. Mehmed died in 1421.