Complex sentence: Mansur hoped to establish a Transcaucasus Islamic state under shari'a law, but was unable to fully achieve this because in the course of the war he was betrayed by the Ottomans, handed to Russians, and executed in 1794.
Split into simpler sentences: Mansur hoped to establish a Transcaucasus Islamic state under shari'a law. He was unable to fully achieve this because in the course of the war he was betrayed by the Ottomans, handed over to Russians, and executed in 1794.