I did my Tour at Long Binh in Oct.17,1968 til Oct.16,1969. I really did 366 days in Vietnam because as I was half-way up to that freedom bird, I was called back down and was told I'll have to wait another day because my WT# was the amount that was over-loaded so I spent another night at Bin Hoa Air Base. I didn't has to go back to Long Binh Post at the 90th Replacement barrels. I was asigned to a re-actional force and was based on the perimater next to the road and lived on the Long Binh Base and was assigned to the 1st Log Provisional Troop Command out of Saigon. I was assigned to a Unit and lived in a 4-man hooch and smell Agent Orange all the time because the Army was always spraying the fence and land mines around our living quarters. My Unit was Company F Provisional Troop Command. After 6 months I was re-assigned to a safer place closer to the middle of the Long Binh Base and my unit was then called Company A Provisional Troop Command.I did alot of traveling to and fro to Saigon(Newton Port) and was put on Convoy with ever, pull sweeps with the 199 light Inf. and the 11 Cav. Also I was put on Convoy and rec'd siper fire and a whole lots of in-coming morter rounds, pus all the guard duty I had to pull while there. That was just a fews things I did while doing my tour in Vietnam. After I was moved in-warded closer to the middle area of the base ,I was also moved to a new Industal Park but it was still called Vehicle Park. I was next to the MP unit. Haven't neet nor heard from anyone who was there and served with me since I left Long Binh in Oct.1969, RainVet! Most provisional units were localy created by the major command, in your case 1st Log. Many time the records were kept at the command level. You might try searching 1st Log archives. At MACV I pulled duty of and on with what they called the MACV Provisional Reactionary Force, which was a fancy name for guard duty. We were "attached" to that "unit" for 60 days on and 60 days off. The duty was strictly at night, and we still had to work at our regular duties. It was a "duty with" not an assignment. I was still assigned to HQ MACV. There is nothing in my 201 file about it, though I did get a ARCOM and a Certificate of Appreciation from the "unit." In later years, it caused some problems as my record of assignments did not show any assignment to such a unit. I told them they could keep the ARCOM if it was such a big deal, but finally they agreed it was ligit. As I said above, I would start the search at 1st Log level. Good luck.