If you were assigned to any US Military unit operating at or near Phan Rang during the late 1965 through 1966-time period, (or even later) and not mentioned, email me firstname.lastname@example.org and I will include your unit.
I remember we had several smaller Army units including truck transportation, Huey helicopter, and MACV Advisors; as well as an Air Force Forward Air Control unit assigned to/near the base. I regretfully apologize for not remembering those unit designations.
366th Tactical Fighter Wing/389th Tactical Fighter Squadron and all support squadrons.
35th Tactical Fighter Wing/F-100 Tactical Fighter Squadrons, B-57 Bomber Squadrons, and all support squadrons.
1st Mobile Communications Group
1882nd Communications Squadron
Det 22, 30th Weather Squadron
101st Airborne Division, 1st Brigade
US Army 1st Logistics Command (Phan Rang Logistics Support Activity)
US Army Phan Rang Subarea Support Command
39th Transportation Battalion
518th Signal Company (on top Nui Dat)
Republic of Korea (ROK) Marine Tiger Division
62nd Army Engineering Battalion
48th Aviation Company
38th Air Rescue Squadron
554th Red Horse
The American Red Cross
RMK/BRJ Construction Contractors (Base Prime Contractor)
Alaska Barge and Transportation Co. (Beach off-load operation)
Pacific Architects, Engineers, Inc. (PAE)
Trans Asia Engineering. (Air Force Power Plant)