Following the Battle of Nizip, Bedir Khan allied himself with
Han Mahmud of Müküs and Nurullah Bey of
Hakkari in 1840 to a triple alliance. In the meantime, Han Mahmoud of Müküs unsuccessfully attempted to conquer the area around
Bitlis. The triple alliance entered in conflict with the local
Assyrian Christian population, and perpetrated
massacres amongst them in 1843 and 1846. After Nurullah Bey unsuccessfully attempted to subdue the Nestorians led by
Shimun XVII Abraham, he called for the assistance by Bedir Khan Beg. And also in 1844 in the
Tur Abdin mountains, Yazidis were again raided by Bedir Khan Beg. Bedir Khan Beg's goal was to force the
Yazidis to convert to
Islam. Pressure from the European Powers to stop the massacres of Christians led to
Ottoman forces invading his territories in 1846–7, with
Omer Pasha's 12,000 strong Ottoman force, which was supported by Yezidi tribesmen seeking revenge, defeating the Kurdish army in the field near Zeitun, Cizre. He was forced to flee to Evruh castle, where he endured an eight months long siege. Bedir Khan had to surrender to the Ottomans at Evreh Castle The same day also Han Mahmud was defeated in
Tatvan. Bedir Khan was betrayed by Yezdanşer a distant relative and high ranking commander of his forces, who had joined the Ottoman Army in exchange of promises of a rank in the government. Yezdanşer would become appointed the
mütesellim of Cizre for a short time. From Evreh castle Bedir Khan and his family were put in chains and taken to Kumçati in the
Şırnak province. After 40 days in detention, == Exile in Crete ==