 Complete the following phrase:  By December 2016, Abu Jandal had risen to the second-most important ISIL commander in Syria, and participated in an offensive to retake Palmyra and its surroundings from the Syrian government. After this attacks success on 11 December, he was redeployed to Raqqa and appointed as chief commander for the defenses of the Islamic States de facto capital in face of the SDF-led 