Excerpts from Books and Wikipedia
"Bayezid I is captured by Tamerlane's forces, causing the interregnum of the Ottoman Empire." [Wikipedia: Timeline of Middle Ages] "The Ottoman Interregnum, or the Ottoman Civil War (20 July 1402 – 5 July 1413; Turkish: Fetret Devri, lit.?'Interregnum Period'), was a civil war in the Ottoman Empire between the sons of Sultan Bayezid I following the defeat of their father at the Battle of Ankara on 20 July 1402. Although Mehmed Çelebi was confirmed as sultan by Timur, his brothers Isa Çelebi, Musa Çelebi, Süleyman Çelebi, and later, Mustafa Çelebi, refused to recognize his authority, each claiming the throne for himself. Civil war was the result. The Interregnum lasted a little under 11 years, until the Battle of Çamurlu on 5 July 1413, when Mehmed Çelebi emerged as victor, crowned himself Sultan Mehmed I, and restored the empire." [Wikipedia]