Who is the FSA, Turkey's allied force in Syria?

The pro-Ankara Syrian forces who helped the Turkish army oust Kurdish militia from the northern Syrian city of Afrin are an umbrella grouping of fighting brigades trained by Turkey into an increasingly effective fighting unit.Ankara calls these Syrian forces the Free Syrian Army (FSA) but in reality they are made out of different components that crystallised during the course of Syria's seven-year civil war.While the Turkish army itself was involved in the two-month offensive that took Afrin fro