▁fought ▁a ▁sharp ▁action ▁at ▁She ikh ▁O th man ▁on ▁ 2 0 ▁July ▁that ▁removed ▁the ▁Turkish ▁threat ▁to ▁A den ▁for ▁the ▁rest ▁of ▁the ▁war , ▁before ▁returning ▁to ▁Egypt . ▁ ▁The ▁ 2 nd ▁Mount ed ▁Division ▁was ▁dis mount ed ▁in ▁August ▁ 1 9 1 5 ▁and ▁served ▁at ▁Gal lip oli . ▁ ▁The ▁art illery ▁batter ies ▁and ▁am mun ition ▁columns , ▁signal ▁troops , ▁mobile ▁veter inary ▁sections , ▁Mount ed ▁Brigade ▁Transport ▁and ▁Supp ly ▁Column s ▁and ▁two ▁of ▁the ▁Field ▁Am bul ances ▁were ▁left ▁behind ▁in ▁Egypt . ▁ ▁The ▁division ▁returned ▁from ▁Gal lip oli ▁in ▁December ▁ 1 9 1 5 ▁and ▁was ▁reform ed ▁and ▁rem ount ed . ▁ ▁On ▁ 1 0 ▁December ▁ 1 9 1 5 , ▁Ber k shire ▁R HA ▁briefly ▁rejo ined ▁the ▁division ▁from ▁Is mail ia , ▁S uez ▁Canal ▁Def ences ; ▁on ▁ 1 7 ▁January ▁ 1 9 1 6 ▁it ▁was ▁transferred ▁with ▁ 2 nd ▁South ▁Mid land ▁Mount ed ▁Brigade ▁to ▁the ▁Western ▁Front ier ▁Force . ▁ ▁Imperial ▁Mount ed ▁Division ▁The ▁Imperial ▁Mount ed ▁Division ▁was ▁formed ▁in ▁Egypt ▁in ▁January ▁ 1 9 1 7 ; ▁ 2 nd ▁South ▁Mid land ▁Mount ed ▁Brigade ▁( by ▁now ▁number ed ▁as ▁ 6 th ▁Mount ed ▁Brigade ) ▁was ▁one ▁of ▁the ▁four ▁caval ry ▁brig ades ▁selected ▁to ▁form ▁the ▁division . ▁ ▁Ber k