Drafted into the US Army in 1969 at age 20
Charlie Troop 1/9th (Blue India, 1970)
After Basic Training at Ft Polk, LA, and Advanced Individual Training (recon) at Ft Knox, KY, I received orders for Vietnam.
In March of 1970, I arrived in Vietnam and was assigned to Charlie Troop, First Squadron, Ninth Cavalry Regiment, First Cavalry Division (Airmobile). We were a recon unit for the 1st Cavalry Division. Our primary mission was to find enemy activity and also QRF (quick reaction force) for downed helicopters. I was with Charlie Troop 1/9th my whole tour (thirteen months) and returned to the ‘World’ in April of 1971.
Upon my arrival at Oakland Army Base, I received my discharge from the Army.
My Vietnam Experience 
I was at Phouc Vinh from 12 Feb. to 13 Dec. 1970. I remember some of the incidents you describe, such as Miss America show, and the incoming on 12 Sept. I was a REMF working at the class 2-4 yard with 15th S&S, and from our AO it looked like the fire was at our class 1 yard, so I was sent up there, because we couldn’t raise the guy that was on guard duty there. I recall there was ammo cooking off from the fire. At the end of my tour, I worked at the old JP4 point overnight, but mostly the new point with the big metal tanks. You were part of the guys that were doing the heavy lifting over there, and thank you for your service, and your blog.
I was with A Co, 5/7 Cav from 8/69 to 6/70. Mos 11B40. Bien HOA to LZ Buttons, to Phouc Vinh , to Tay Ninh, back to Buttons, then home. Cambodia in the spring of 70.
Buttons was a mud hole during monsoons. Didn’t spend much time on any base – mostly in the bush. We humped all day – ambushed at night. Living in the jungle day AND night.
My training was Ft Knox, to Ft Polk, Benning for NCO School, then back to Polk (YUK!!!). POLK SUCKED.