▁ 6 4 9 1 st ▁Air ▁Def ense ▁Fl ight ▁were ▁activ ated ▁to ▁operate ▁its ▁defense ▁systems . ▁ ▁The ▁Hawai ian ▁Guard ▁f ighter ▁unit ▁converted ▁from ▁the ▁F - 1 0 2 ▁to ▁the ▁Mc D onn ell ▁F - 4 ▁Ph antom ▁II ▁and ▁became ▁the ▁ 1 9 9 th ▁T act ical ▁F ighter ▁Squadron , ▁with ▁a ▁bro ader ▁mission ▁than ▁air ▁defense . ▁ ▁The ▁division ▁partially ▁converted ▁its ▁air ▁defense ▁systems ▁into ▁mobile ▁tact ical ▁air ▁control ▁systems . ▁Working ▁in ▁conj unction ▁with ▁the ▁Hawai i ▁Air ▁National ▁Guard , ▁it ▁conducted ▁and ▁participated ▁in ▁numerous ▁tact ical ▁air ▁operations ▁and ▁training ▁exer cis es . ▁ ▁Four ▁years ▁later , ▁the ▁division ▁expanded ▁its ▁tact ical ▁mission ▁when ▁the ▁ 2 2 d ▁T act ical ▁Air ▁Support ▁Squadron ▁was ▁assigned . ▁ ▁In ▁ 1 9 8 3 ▁the ▁division ' s ▁air ▁defense ▁responsibility ▁was ▁expanded ▁to ▁include ▁the ▁air ▁defense ▁of ▁the ▁Mar iana ▁Islands , ▁including ▁Gu am . ▁The ▁following ▁year , ▁the ▁division ' s ▁air ▁defense ▁system ▁was ▁upgrad ed ▁from ▁a ▁manual ▁to ▁an ▁autom ated ▁system ▁as ▁its ▁Regional ▁Oper ational ▁Control ▁Center ▁came ▁online . ▁ ▁In ▁ 1 9 8 9 ▁the ▁division ▁was ▁in activ ated ▁and ▁its ▁air ▁defense ▁mission ▁was ▁transferred ▁to ▁the ▁ 6 0 1 0 th , ▁which ▁was ▁expanded ▁to ▁become ▁the ▁ 6 0 1 0 th ▁A eros pace ▁Def ense