Battletech 27: Operation Excalibur

The Mercenary code was broken by the Gray Death Legion during their desperate fighting on the planet Caledonia. At least, that is the ruling of the courts. And the judges decide to hit below the belt - Grayson Carlyle, revered leader of the now outlawed mercenary band, is stripped of his title and holdings, and the legion is banished from Glengarry, the planet they've called home for years.