▁with ▁units ▁man ning ▁their ▁emer gency ▁positions ▁within ▁ 2 4 ▁hours , ▁even ▁though ▁many ▁did ▁not ▁yet ▁have ▁their ▁full ▁complement ▁of ▁men ▁or ▁equipment . ▁The ▁emer gency ▁last ed ▁three ▁weeks , ▁and ▁they ▁were ▁stood ▁down ▁on ▁ 1 3 ▁October . ▁In ▁February ▁ 1 9 3 9 ▁the ▁existing ▁AA ▁def ences ▁came ▁under ▁the ▁control ▁of ▁a ▁new ▁Anti - A ircraft ▁Command . ▁In ▁June ▁a ▁partial ▁mobil isation ▁of ▁T A ▁units ▁was ▁begun ▁in ▁a ▁process ▁known ▁as ▁' cou vert ure ', ▁where by ▁each ▁AA ▁unit ▁did ▁a ▁month ' s ▁tour ▁of ▁duty ▁in ▁rotation ▁to ▁man ▁selected ▁AA ▁and ▁search light ▁positions . ▁On ▁ 2 4 ▁August , ▁ahead ▁of ▁the ▁declaration ▁of ▁war , ▁AA ▁Command ▁was ▁fully ▁mobil ised ▁at ▁its ▁war ▁stations . ▁ 6 0 th ▁AA ▁Regiment ▁mobil ised ▁at ▁B rom ley ▁( 1 6 8 th , ▁ 1 6 9 th ▁and ▁ 1 9 4 th ▁H AA ▁B t ys ) ▁with ▁a ▁mixture ▁of ▁ ▁old ▁ 3 - inch ▁and ▁newer ▁ 3 . 7 - inch ▁guns , ▁and ▁was ▁transferred ▁to ▁a ▁new ▁ 4 8 ▁AA ▁B de ▁formed ▁within ▁ 1 ▁AA ▁Division . ▁ ▁Battle ▁of ▁France ▁ ▁On ▁ 1 0 ▁October ▁ 1 9 3 9 ▁the ▁regiment ▁moved ▁to ▁France ▁with ▁ 2 4 ▁x ▁ 3 - inch ▁guns ▁to ▁join ▁the ▁British ▁Ex ped