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Turkey, Russia, and Iran released a joint statement - termed the ‘Moscow Declaration’ - noting that all three countries agree to “facilitate and become the guarantors” of any political agreement to end the Syrian Civil War following a trilateral meeting in Moscow, Russia on December 20. Meanwhile, pro-regime forces announced their full control over Aleppo City on December 22 following the last evacuations from the remaining opposition-held districts of Eastern Aleppo City.

Local and regional actors are maneuvering to secure their position in 2017 and for a post-ISIS Mosul.

Operations in eastern Mosul largely paused from December 13 to 19 likely in order to stem the growing casualties taken by the Iraqi Security Forces (ISF) and to regroup before pushing into central Mosul. Meanwhile, the Popular Mobilization continued its push west, connecting its parallel lines of effort when it recaptured the north-south road between the Tel Afar Airbase and the southern town of Ashwa on December 13.

Opposition forces and civilians began to evacuate from Eastern Aleppo City on December 15 following bilateral negotiations between Russia and Turkey. Opposition forces also agreed on medical evacuations from Fu'ah and Kefraya in Idlib Province after Iran threatened to collapse the agreement. Meanwhile, ISIS recaptured the city of Palmyra in Eastern Homs Province on December 11, marking the first seizure of a major urban center by ISIS in Iraq and Syria since May 2015

The Iraqi Security Forces (ISF) continued operations to retake Mosul and its environs, consolidating gains along its five axes before breaching the city limits on November 1.

ISIS recaptured the historic city of Palmyra in Eastern Homs Province on December 11 following the withdrawal of pro-regime forces, marking the first seizure of a major urban center by ISIS in Iraq and Syria since ISIS

The Iraqi Security Forces (ISF) made significant gains in northeastern Mosul from December 6 to 12, but struggled to advance in the southeast. The ISF ordered a change in tactic on December 4 in order to address the lopsided eastern offensive, attempting to make rapid advances in the southeast rather than grind through neighborhood-by-neighborhood clearing operations. The shift, however, failed drastically when the rapid gains left the ISF open to ISIS counterattacks, resulting in heavy casualties on December 6 and 7. In response, the ISF moved units previously allocated to breach Mosul’s southwestern neighborhoods to reinforce efforts in the southeast on December 10.