In three days, the political landscape of Syria has changed. Turkish backed Islamists have taken advantage of the power vacuums created by Israel’s wars and have taken control of Aleppo. Syrian Government forces have melted away in their path, and Russia has proved too busy with Ukraine to stop the advance. As the SDF prepares to defend Kurdish areas against expected attacks, this week’s review explores the background to what is happening and the different players involved, as well as the story so far.