Nye G "Dusty" Rodes was the executive officer under Col Adolf Schwenk when the 27th Marines (RLT) deployed to Vietnam in February of 1968:
Here is more background information on the XO from:
http://www.mcu.usmc.mil/historydivision/Pages/Publications/Publication%20PDFs/Montross_U.S.%20Marine%20Operations%20in%20Korea%20Vol%20l.pdf
1st Lt Rodes was the Detachment Commander for the military police unit attached to the Pusan Perimeter landing force, the Fifth Marine Brigade:
BTW: The face in the photo above is unforgettable and I don't think I have ever had the honor to have been under the command of a meaner Marine...Dusty Rodes was flat out mean and turned up as the Camp Pendleton Correctional Facility (brig) commander in 1970.