om ▁called ▁for ▁volunte ers ▁to ▁serve ▁in ▁South ▁Vietnam . ▁There ▁was ▁an ▁enthus i astic ▁response ▁from ▁the ▁male ▁popul ace , ▁with ▁over ▁ 5 , 0 0 0 ▁rec ruits ▁just ▁from ▁Bang k ok . ▁It ▁seems ▁that ▁this ▁mobil ization — which ▁resulted ▁in ▁U . S .- fund ed ▁Th ai ▁troops ▁landing ▁in ▁South ▁Vietnam ▁in ▁ 1 9 6 7 — con ce aled ▁the ▁di version ▁of ▁some ▁of ▁the ▁man power ▁into ▁La os . ▁ ▁S uc ceed ing ▁Special ▁Re quire ment ▁units ▁served ▁as ▁rein for cement ▁of ▁F AN ▁forces ▁station ed ▁at ▁the ▁forward ▁all - we ather ▁air ▁strip ▁at ▁Mu ang ▁Sou i . ▁During ▁Camp aign ▁To an ▁Th ang , ▁on ▁ 2 4 ▁June ▁ 1 9 6 9 , ▁when ▁People ' s ▁Army ▁of ▁Vietnam ▁( PA V N ) ▁troops ▁had ▁scattered ▁F AN , ▁Special ▁Re quire ment ▁ 8 ' s ▁ 3 1 7 ▁men ▁man ned ▁its ▁guns ▁and ▁held ▁its ▁ground . ▁An ▁ev acu ation ▁of ▁F AN ▁depend ents ▁via ▁hel ic opter ▁sa pped ▁the ▁Ne ut ral ist ▁will ▁to ▁resist , ▁and ▁they ▁abandoned ▁Mou ng ▁Sou i . ▁En circ led ▁and ▁out number ed ▁by ▁their ▁attack ers , ▁under ▁tank ▁and ▁art illery ▁fire , ▁the ▁senior ▁Th ai ▁officer ▁at ▁the ▁site ▁had ▁to ▁be ▁ordered ▁to ▁withdraw . ▁On ▁ 2 6 ▁June ,