▁the ▁two ▁communities ▁grew ▁together ▁and ▁became ▁known ▁as ▁Beng ies - Ch ase , ▁or ▁simply ▁Ch ase . ▁From ▁its ▁in ception ▁until ▁the ▁mid - tw enti eth ▁century , ▁the ▁primary ▁employ ers ▁were ▁the ▁Baltimore ▁Rail road ▁and ▁local ▁far ms . ▁Ch ase ▁remained ▁a ▁primarily ▁African ▁American ▁rural ▁community ▁until ▁the ▁mid - tw enti eth ▁century , ▁when ▁Ch ase ▁began ▁to ▁be ▁used ▁as ▁a ▁sub urb ▁of ▁Baltimore ▁City . ▁ ▁During ▁World ▁War ▁II , ▁Ch ase ▁received ▁a ▁population ▁boost ▁following ▁the ▁opening ▁of ▁the ▁Gl enn ▁L . ▁Martin ▁Company ▁aircraft ▁plant ▁in ▁Middle ▁River . ▁ ▁On ▁May ▁ 1 2 , ▁ 1 9 5 9 , ▁Capital ▁Airlines ▁Fl ight ▁ 7 5 ▁crash ed ▁in ▁Ch ase ▁en ▁route ▁from ▁La ▁Guard ia ▁Airport ▁to ▁Atlanta ▁Airport . ▁ ▁From ▁ 1 9 4 9 ▁to ▁ 1 9 6 9 , ▁the ▁United ▁States ▁Army ▁used ▁Car roll ▁Island ▁( a ▁large ▁island ▁near ▁Ch ase ), ▁and ▁Gra ces ▁Qu arters ▁( a ▁large ▁pen ins ula ▁between ▁the ▁D und ee ▁Creek ▁and ▁Gun pow der ▁River ) ▁to ▁test ▁and ▁dispose ▁of ▁chemical ▁weapons , ▁including : ▁V X ▁( ner ve ▁agent ), ▁sar in , ▁must ard ▁gas , ▁in cap ac it ating ▁agents , ▁and ▁other ▁le th al ▁agents . ▁These ▁areas ▁were ▁considered ▁to ▁be ▁a ▁part ▁of ▁Aber de en ▁Pro ving ▁Gr ounds ▁and