Manpower from Iran and bombs from Russia have enabled the Syrian troops to come within a few miles of encircling Aleppo. Thousands are fleeing the area in fear of an impending siege. ISW reports: Battlefield realities rather than great power politics will determine the ultimate terms of a settlement to end the Syrian Civil War. Syrian President Bashar al-Assad and his allies in Russia and Iran have internalized this basic principle even as Washington and other Western capitals pinned their hopes upon UN-sponsored Geneva Talks, which faltered only two days after they began on February 1, 2016. Russian airpower and Iranian manpower have brought President Assad within five miles of completing the encirclement of Aleppo City, the largest urban center in Syria and an opposition stronghold since 2012. The current campaign has already surpassed the high-water mark set by the regime’s previous failed attempt to besiege Aleppo City in early 2015. The full encirclement of Aleppo City would fuel a humanitarian catastrophe, shatter opposition morale, fundamentally challenge Turkish strategic ambitions, and deny the opposition its most valuable bargaining chip before the international community. The campaign against Aleppo City began in October 2015 and proceeded in several phases. Regime forces enabled by [...]