The Wylde Cards
The Wylde Cards was a mercenary unit of unspecified size and composition raised in 2859, during the Second Succession War. Context suggests[1] they were a 'Mech regiment.
The unit was in Draconis Combine employ, rated a medium-weight regular unit at full strength, and considered to be of questionable loyalty. By 2864 they had reportedly lost their ability to function as a combat unit, and weren't reconstituted afterwards.[2]