thundering wrote: If I take them as a Combined Arms detachment, what force org do I use?
You can't use any other
FOC than the one listed for the Detachment.
You can't take a
CAD and change the
FOC that comes with it!
Since they have no troops, no you can't use a
CAD or Allied Detachment.
You use the Inquisition Detachment, with the number of units listed.