[naturalman1975]

The SAS has its own rank structure - everybody reverts to Trooper (Private) on joining and most never get promoted at all - any NCO rank in the SAS reflects a command position.

On leaving the SAS, a soldier reverts to his previous rank plus accrued seniority. Roberts-Smith was a Corporal with 3RAR before he went into the SAS - before he musters out, he can expect to, briefly, be 'posted' back to them, certainly as a Sergeant, maybe as a Warrant Officer Class Two (Company Sergeant Major equivalent).

[Chode]

well that explains a lot and i thank you for it