Abdullah Almousa identifies three main reasons for the fall of Aleppo in late 2016.
1. Infighting between some groups in Aleppo city, especially the attacks of Jabhat al-Nusra and the Zenki movement against the Fastaqim Union that led to a collapse of defense lines.
2. The withdrawal of large groups like Nusra, Ahrar al-Sham and Liwa al-Tawheed into the countryside. That withdrawal began with the outbreak of an all-out war between ISIS and the armed opposition in early 2014 and left Aleppo's defense to weaker groups.
3. Limited support provided by the Turkish based operations room (MOM), a shortage of heavy weapons and ammunition in particular.Read more...