Watching Lam Son 719 from FSB Sarge

Hello --
  I was with the 407th Radio Research Detachment in support 
of 1st Bde, 5th Mech Infantry Div in Quang Tri Province, 
1970-1971.  
   During Lam Son 719, I was out on FSB Sarge, overlooking 
the VanderGrift base area that, at other times, was vacant, 
but for LS 719 was filled with US & ARVN units doing supply 
and rear/supply line guard duty.  Every night, at the base 
of our hill, on the edge of VanderGrift's pads and bunkers, 
a Duster would crank out several burst of night defensive 
fire.  I will always remember seeing the tracers lancing 
through the dark, then hearing the individual concussions 
of their firing a couple seconds behind.
  As various units moved forward, our RR bunker and a quad-50
crew next door was sometimes "co-located" with ARVN 1st 
Division, Ben Hai Regiment infantry companies, then a
Regional Forces Company (256th?), and later a company from 
101st Abn.
  Who all was trekking through the valley below along QL 9 
en route to and from Khe Sanh, I don't know.  We did see
some convoys taking rounds on QL 9, and one morning, a tank
was blown at the base of our hill (sometimes listed on VN
maps as Dong Toan, and a ridge or so away from Ba Ho).
  Anybody else see the same playgrounds then?

   Grace & Peace,
   Ralph S. Carlson