>>95933169
A graphic? I never really pictured the force beyond the FOC list.
It's an Alpha Legion independent cell. There's definitely other clones of it, but it changes config whenever it needs to.
The fluff is that it always gets to deploy the same marines because the casualties are replaced by new recruits, and the previous new guys ascend to vets.
The current commander is the former Saboteur. He ate the brain of his former commander (died in battle) and found out that guy had been the Saboteur before him, inherited the post the same way.
He thus promoted his only surviving Seeker to Saboteur (like he himself had been), and reconstituted the next iteration of the Unbroken Chain...