The nature of violent militias is such that they tend to be divided into units. So we typically end up with some four units.
The first unit that we tend to see in violent militias is the one that does the actual fighting. This unit has the foot-soldiers on the one hand (these being the majority, who are also viewed as easily dispensable) and the commanders on the other hand (who, in a proper army, would be the commissioned officers cadre, and who are greatly valued).
The second unit that we tend to see in violent militias is the one that handles financing issues. In some cases, this unit is involved in businesses (legal or otherwise) whose proceeds are then used to keep the militias going.
The third unit that we tend to see in violent militias is the one that handles intelligence issues. The nature of the activities undertaken by militias is such that they need a lot of intelligence, hence the need for a dedicated intelligence unit.
The fourth unit that we tend to see in violent militias is the one that can be termed as the ‘political wing.’ This is the one that does political negotiations on behalf of the militia. This is the visible wing of the militia. This is also the wing that does propaganda work for the militia.