. ▁Army ▁Qu arter master ▁Corps ▁on ▁May ▁ 5 , ▁ 1 9 1 7 . ▁He ▁was ▁assigned ▁to ▁the ▁Rem ount ▁Division ▁in ▁Washington , ▁D . C ., ▁and ▁was ▁dis charg ed ▁on ▁May ▁ 2 1 , ▁ 1 9 2 0 . ▁ ▁August ▁Bel mont ▁Jr . ▁( 1 8 5 3 – 1 9 2 4 ), ▁was ▁an ▁American ▁financi er ▁who ▁lev ied ▁the ▁construction ▁of ▁the ▁original ▁New ▁York ▁sub way ▁( 1 9 0 0 – 1 9 0 4 ) ▁and ▁for ▁many ▁years ▁head ed ▁the ▁Inter borough ▁Rap id ▁Trans it ▁Co ., ▁which ▁ran ▁the ▁trans it ▁system . ▁He ▁also ▁fin anced ▁and ▁led ▁the ▁construction ▁of ▁the ▁Cape ▁C od ▁Canal ▁in ▁Massachusetts , ▁which ▁opened ▁in ▁ 1 9 1 4 . ▁ ▁Bel mont ▁bought ▁the ▁land ▁for ▁and ▁built ▁New ▁York ' s ▁Bel mont ▁Park ▁rac et rack — named ▁for ▁his ▁father — and ▁was ▁a ▁major ▁owner / bre eder ▁of ▁thorough bre d ▁race h ors es . ▁He ▁served ▁as ▁chairman ▁of ▁the ▁board ▁of ▁the ▁Louis ville ▁and ▁Nash ville ▁Rail road . ▁He ▁also ▁served ▁as ▁a ▁director ▁of ▁the ▁Southern ▁Pacific ▁Co ., ▁parent ▁of ▁the ▁rail road , ▁and ▁National ▁Park ▁Bank . ▁He ▁and ▁his ▁brother , ▁Perry ▁Bel mont , ▁were ▁also ▁found ing ▁members ▁of ▁The ▁J ockey ▁Club . ▁ ▁Frederick a ▁Bel mont ▁( 1 8 5