The Ninth FedCom RCT was assigned to hunt down the pirate queen Paula Trevaline shortly after its formation. Its was a good way to blood a new unit as well as meeting a function of the House military. I cannot find too much about the composition of the unit, but the FedCom RCTs seemed to be built out of common/production mediums & lights for most the unit with some heavier forces consolidated in a few formations- Enforcers, Griffins, and Valkyries (4SW Atlas). Which means IMO the 9th would likely be mostly meds & lights since its formation was delayed due to the War of 3039 recovery- and spare heavies & assaults likely went to replace losses.
However they lost over 900 infantry, a battalion of armored vehicles (36? might be APCs too), wing of ASF- includes 2 DS, and two companies of mechs during their pirate hunt. Do we know the trail they followed to catch her? How many pirate havens they smashed? What number of pirates they stamped out?