Editing Osman I (section)

=== Conquest of Bilecik, Yarhisar, and İnegöl ===
Soon after the conquest of Karacahisar, Osman marched with his soldiers north towards [[Sakarya River]]. Upon his arrival there, he raided and looted the forts of [[Göynük]] and [[Taraklı|Yenice Taraklı]]. Many argue that during this time, Osman received a message from his Byzantine friend Köse Mihal, warning him of a secret conspiracy that was being prepared by the ''tekfurs'' of Bilecik and Yarhisar. The two were aiming at killing Osman after inviting him to attend their children's wedding. Osman was disappointed by being betrayed by Bilecik's tekfur. That is because he considered the relationship with Bilecik to have been built on trust and good faith, as demonstrated by the aforementioned custom of his clan leaving their belongings in this fortress whenever they moved between grazing areas. Osman devised a plan to escape the trap and take over the fortress. He sent forty of his soldiers carrying some of the clan's belongings to be kept in Bilecik, while most of its inhabitants were outside attending the wedding. Once his men entered the fort, they quickly overpowered its small garrison, and it fell to the Ottomans. Then, Osman went to the feast followed by some Byzantine knights who were easily ambushed by his men later. A short battle took place in which Osman was victorious, and most of the Byzantines were killed. After that, Osman rode towards Yarhisar and took it by surprise; A large part of the fort's garrison was killed, while the rest were taken prisoners. The ''tekfur's'' daughter Holophira, was also captured in this action, she soon became Osman's daughter in law, having married his son Orhan sometime later,<ref name="Munejjim">{{cite book|last1=Müneccimbaşı|first1=Ahmed Lütfullah|title=Kitāb Jāmiʻ al-duwal|publisher=Dār al-Shafaq|year=2009|place=Beirut|pages=229–231|language=ar|trans-title=The Compendium of Nations}}</ref> and her name was changed in Bayalun<ref>{{cite book|last1=Peirce|first1=Leslie P.|url=https://books.google.com/books?id=L6-VRgVzRcUC&pg=PR19|title=The Imperial Harem: Women and Sovereignty in the Ottoman Empire|publisher=Oxford University Press|year=1993|isbn=0-19-508677-5|place=New York|page=34|archive-url=https://web.archive.org/web/20200409223340/https://books.google.com.lb/books?id=L6-VRgVzRcUC&pg=PR19&source=gbs_selected_pages&cad=2|archive-date=9 April 2020}}</ref><ref>{{Cite book |last=Sakaoğlu |first=Necdet |url=https://books.google.com/books?id=6WUMAQAAMAAJ |title=Bu mülkün kadın sultanları: vâlide sultanlar, hâtunlar, hasekiler, kadınefendiler, sultanefendiler |date=2008 |publisher=Oğlak Yayıncılık |isbn=978-975-329-623-6 |pages=39–40 |language=tr}}</ref><ref>{{Cite web |title="Nilüfer Hatun" |url=https://islamansiklopedisi.org.tr/ |access-date=2024-04-25 |website=TDV İslâm Ansiklopedisi |language=tr}}</ref><ref>{{Cite book |last=Alderson |first=A. D. |title=The structure of the Ottoman dynasty |date=1982 |publisher=Greenwood Press |isbn=978-0-313-22522-2 |location=Westport, Conn |chapter=Orhan}}</ref> Afterwards, Osman and several of his men took over all towns and villages surrounding İnegöl, before laying siege on the fort itself and taking it with ease. Osman ordered the execution of İnegöl's ''tekfur'' since he was known for persecuting his Muslim neighbours, then placed a new garrison for the town, and distributed the loot among his men.<ref name="Munejjim"/>