The Battle of Ulubad was fought sometime between 9 March and early May 1403 at

Ulubad Ulubad or Uluabat, in the Byzantine period Lopadion ( grc, Λοπάδιον), Latinized as Lopadium, is a settlement near the town of Karacabey in the Bursa Province of northwestern Turkey. It was sited on the ancient Miletouteichos. History Ulu ...

between the rival sons of the Ottoman

Sultan Sultan (; ar, سلطان ', ) is a position with several historical meanings. Originally, it was an Arabic abstract noun meaning "strength", "authority", "rulership", derived from the verbal noun ', meaning "authority" or "power". Later, it c ...

Bayezid I Bayezid I ( ota, بايزيد اول, tr, I. Bayezid), also known as Bayezid the Thunderbolt ( ota, link=no, یلدیرم بايزيد, tr, Yıldırım Bayezid, link=no; – 8 March 1403) was the Ottoman Sultan from 1389 to 1402. He adopted ...

Mehmed Çelebi Mehmed I ( 1386 – 26 May 1421), also known as Mehmed Çelebi ( ota, چلبی محمد, "the noble-born") or Kirişçi ( el, Κυριτζής, Kyritzis, "lord's son"), was the Ottoman sultan from 1413 to 1421. The fourth son of Sultan Bayezid ...

and

İsa Çelebi İsa Çelebi (1380 – 1406) was an Ottoman prince ( tr, şehzade) and a co-ruler of the empire during the Ottoman Interregnum. Background İsa was one of the sons of Beyazid I, the Ottoman sultan. His mother was Devletşah Hatun, the daughter ...

, during the first stages of the civil war known as the Ottoman Interregnum. The battle was a major victory for Mehmed, who occupied the Ottoman capital,

Bursa ( grc-gre, Προῦσα, Proûsa, Latin: Prusa, ota, بورسه, Arabic:بورصة) is a city in northwestern Turkey and the administrative center of Bursa Province. The fourth-most populous city in Turkey and second-most populous in the ...

, and became master of the Ottomans'

Anatolia Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The re ...

n domains. İsa fled to

Constantinople la, Constantinopolis ota, قسطنطينيه , alternate_name = Byzantion (earlier Greek name), Nova Roma ("New Rome"), Miklagard/Miklagarth (Old Norse), Tsargrad ( Slavic), Qustantiniya (Arabic), Basileuousa ("Queen of Cities"), Megalopolis (" ...

, while Mehmed proceeded to formally lay claim to the succession of Bayezid by an enthronement ceremony in Bursa, and by having his father's body buried there. By 18 May 1403, however, İsa returned to Anatolia with an army provided by their oldest brother, Süleyman Çelebi, ruler of

Rumelia Rumelia ( ota, روم ايلى, Rum İli; tr, Rumeli; el, Ρωμυλία), etymologically "Land of the Romans", at the time meaning Eastern Orthodox Christians and more specifically Christians from the Byzantine rite, was the name of a hi ...

. İsa was again defeated and eventually killed after a series of battles by September.

References

Sources

* * * 1403 in Asia Conflicts in 1403

History of Bursa Province 1400s in the Ottoman Empire {{Ottoman-battle-stub