Ibn Ardashir maintains that Bayezid sent for negotiations, but Burhan al-Din insisted first on the Ottomans leaving Osmancık, which he claimed.[12] Manuel II corroborates this, writing that Bayezid only intended to force the submission of a chieftain called Peitzas,[lower-alpha 2] who ruled between Sinop and Samsun, as well as of İsfendiyar of Sinop, and frighten Burhan al-Din, "the man who rules Sebasteia with the Scythians".[lower-alpha 3][13]