▁intellect uals ▁who ▁were ▁involved ▁in ▁the ▁event . ▁ ▁C aus es ▁The ▁ 1 9 4 6 ▁East ▁Sum atra ▁social ▁revolution ▁was ▁an ▁outcome ▁of ▁class , ▁ide ological ▁and ▁eth nic ▁t ensions ▁that ▁had ▁accum ulated ▁over ▁several ▁dec ades . ▁Since ▁the ▁Dutch ▁colonial ▁period , ▁the ▁region ’ s ▁dem ograph ics , ▁so cio - polit ical ▁structure ▁and ▁economic ▁system ▁had ▁under g one ▁great ▁changes . ▁Many ▁loc als , ▁especially ▁those ▁of ▁the ▁low ▁and ▁middle ▁class ed , ▁who ▁were ▁consist ently ▁suppress ed ▁under ▁the ▁hierarchy ▁system , ▁became ▁highly ▁diss atisf ied ▁with ▁the ▁ker aja an ▁hierarchy ▁and ▁the ▁Dutch . ▁The ▁national ▁revolution ▁ ▁also ▁reflected ▁a ▁great ▁divers ity ▁of ▁interests ▁from ▁almost ▁all ▁sections ▁of ▁Sum at ran ▁society ▁and ▁several ▁complex ▁issues ▁behind ▁the ▁fight ▁for ▁independence ▁in ▁East ▁Sum atra . ▁ ▁Political ▁C aus es : ▁ ▁By ▁ 1 9 4 2 , ▁the ▁Dutch , ▁who ▁were ▁account able ▁to ▁the ▁Netherlands ▁East ▁Ind ies ▁government ▁in ▁Bat avia , ▁were ▁holding ▁on ▁to ▁majority ▁of ▁the ▁administrative ▁power ▁in ▁the ▁region . ▁A ▁fe ud al ▁government ▁was ▁formed ▁over ▁the ▁four ▁primary ▁s ultan ates ▁in ▁the ▁region ▁( L ang k at , ▁Ser d ang , ▁D eli ▁and ▁As ah an ) ▁and ▁ker aja an ▁before ▁( and ▁after ) ▁the ▁arrival ▁of ▁the ▁Dutch , ▁Under ▁Dutch ▁rule , ▁the ▁kingdom s ▁and