Recruitment markers are used to "pay" for team members in Fallout 3's Operation: Anchorage add-on.
You receive them from Lieutenant Morgan in the Anchorage Reclamation simulation. They can be spent at Patterson's terminal in the U.S. Army field headquarters's Command tent.
- The markers look like caps, probably because they are quest items and are usually never seen because they cannot be removed from the inventory.
- All of these items disappear after accepting your squad even if you had some left.