The Military Structure of Hay'at Tahrir al-Sham

Hay’at Tahrir al-Sham, the dominant insurgent organisation in northwest Syria, shifted its primary military structure from four main ‘armies’ named for the Rashidun caliphs to multiple brigades. I have already alluded to these brigades previously and how there appear to be at least ten brigades named for the ten companions of the Prophet promised Paradise (I had first heard of this concept from a source who says he is in one of those brigades, having previously served in the ‘Red Bands’ special formation).