Karahisar Expedition (1418)

The Karahisar Expedition was a military operation launched by the Karakoyunlu against the Ottoman Empire in 1418. Pir Ömer, the Karakoyunlu governor of Erzincan, entered Ottoman territory and captured Karahisar and Karahisar Castle. As a result, the eastern Black Sea coast, with the exception of Samsun, came under Karakoyunlu control.

 Expedition 
Before Shahrukh's campaign to Azerbaijan, there were some disagreements in Ottoman-Karakoyunlu relations. Kara Yusuf's sending Pir Ömer, the ruler of Erzincan, to besiege Karahisar caused this tension. The ruler of the city, Hasan, son of Melik Ahmed, appealed to Prince Murad, the governor of Amasya, and Sultan Mehmed I Çelebi for help.Neşri M. Kitabi-Cihannüma. Neşri tarihi. c. 2. Haz., M.A. Köymen ve F.A. Unat. Ankara, 1957.Anhegger R. Mehmed b. Halilül Konevi’nin Tevarihi Ali Osman. //Tarih dergisi. İstanbul. 1950.Anhegger R. Mehmed b. Halilül Konevi’nin Tevarihi Ali Osman. //Tarih dergisi. c.II, sayı 3-4. İstanbul. 1950. However, Sultan Mehmed I Çelebi could not help Hasan, and the city was captured by Pir Ömer.Danışman Z. Osmanlı İmparatorluğu Tarihi. c. III. İstanbul, 1958.

 References 

 Further readings 
 Tofiq Necefli, Azerbaycan Karakoyunlu ve Akkoyunlu devletleri, Çaşıoğlu Yayınları, Bakü 2012, s.159. ISBN 978-9952-27-358-8