ated ▁after ▁a ▁heavy ▁bomb ard ment .' ▁ ▁September ▁ 1 9 7 0 ▁is ▁known ▁as ▁Black ▁September ▁in ▁Arab ▁history . ▁In ▁September ▁ 1 9 7 0 , ▁King ▁Hus sein ▁moved ▁to ▁qu ash ▁an ▁attempt ▁by ▁armed ▁Palest in ian ▁ins urg ents ▁to ▁over throw ▁his ▁mon archy . ▁The ▁violence ▁resulted ▁in ▁civil ian ▁cas ual ties ▁on ▁both ▁sides . ▁Ar med ▁conflict ▁last ed ▁until ▁July ▁ 1 9 7 1 ▁ending ▁only ▁when ▁remaining ▁Palest in ian ▁ins urg ents ▁were ▁surrounded ▁in ▁the ▁A jl oun - J ar ash ▁mountains , ▁finally ▁surrender ed ▁to ▁the ▁Jordan ▁army ▁and ▁were ▁exp elled ▁from ▁the ▁country .' ▁In ▁October ▁ 1 9 7 0 , ▁the ▁Ba ' ath ist ▁regime ▁in ▁neighbor ing ▁Sy ria ▁had ▁attempted ▁to ▁interven e ▁in ▁support ▁of ▁the ▁Palest ini ans ▁by ▁sending ▁an ▁arm oured ▁column ▁into ▁the ▁north ▁of ▁Jordan . ▁Jordan ian ▁ground ▁and ▁air ▁forces ▁were ▁able ▁to ▁halt ▁this ▁advance ▁and ▁a ▁combination ▁of ▁international ▁political ▁pressure ▁and ▁disc ord ▁within ▁the ▁Sy rian ▁military ▁led ▁to ▁a ▁Sy rian ▁retre at . ▁ ▁In ▁the ▁ 1 9 7 3 ▁Y om ▁K ipp ur ▁War , ▁the ▁ 4 0 th ▁Arm oured ▁Brigade ▁was ▁sent ▁to ▁the ▁Sy rian ▁front . ▁ ▁After ▁ 1 9 7 7 ▁Since ▁the ▁major ▁re organisation ▁of ▁ 1 9 7 7 , ▁the ▁Royal ▁Jordan ian ▁Army ▁has