This is an (exhaustive) list compiled by the Marine Corps recently of all unit citations issued to Marine units from 1942 through OIF/OEF. Just posting it as a service to anybody wondering if they get an add-on to the ribbon rack.
https://www.vmfa251.org/pdffiles/UDATED_NAVMCW_PROG_PG.pdf
https://www.vmfa251.org/pdffiles/UDATED_NAVMCW_PROG_PG.pdf