http://www.jpost.com/Middle-East/ISIS-T ... nit-471695"Broadly, ISIS's military structure is broken down into three: Farqa (division), Liwa (brigade) and katiba (battalion).
According to the chart seen by The Jerusalem Post, which outlines the structure of a brigade, each brigade consists of 4 battalions. The brigade is headed by an emir (commander) who has two deputy emirs, an administration official as well as a shura council (consultative council).
In addition, each ISIS brigade has two administrative divisions: office administration and a field administration.
Tamimi, a Syria researcher who collects and analyzes leaked ISIS documents, told The Jerusalem Post that “for example, within the office administration is a division responsible for food provision and cooking, consisting of 10 people. While in the field administration, there are 7 people responsible for media.”
Another aspect covered by the administrative division of a brigade was that of the “affairs of the mujihadin.”"