▁these ▁fa ctions ▁were ▁often ▁accompanied ▁by ▁charges ▁of ▁tre ason ▁and ▁blo ody ▁p urg es , ▁initi ating ▁a ▁cycle ▁of ▁reven ge ▁with ▁each ▁change ▁of ▁regime . ▁ ▁One ▁example ▁is ▁the ▁ 1 5 8 9 ▁re bell ion ▁of ▁Je ong ▁Ye o - rip , ▁one ▁of ▁the ▁blood iest ▁political ▁p urg es ▁of ▁Jose on . ▁Je ong ▁Ye o - rip , ▁an ▁Eastern er , ▁had ▁formed ▁a ▁society ▁with ▁group ▁of ▁supp or ters ▁that ▁also ▁received ▁military ▁training ▁to ▁fight ▁against ▁Wa egu . ▁There ▁is ▁still ▁a ▁dispute ▁about ▁the ▁nature ▁and ▁purpose ▁of ▁his ▁group , ▁which ▁reflected ▁desire ▁for ▁class less ▁society ▁and ▁spread ▁throughout ▁Hon am . ▁He ▁was ▁subsequently ▁accused ▁of ▁consp i racy ▁to ▁start ▁a ▁re bell ion . ▁Je ong ▁Che ol , ▁head ▁of ▁the ▁Western ▁fa ction , ▁was ▁in ▁charge ▁of ▁investig ating ▁the ▁case ▁and ▁used ▁this ▁event ▁to ▁effect ▁w ides p read ▁pur ge ▁of ▁Eastern ers ▁who ▁had ▁slight est ▁connection ▁with ▁Je ong ▁Ye o - rip . ▁Event ually ▁ 1 0 0 0 ▁Eastern ers ▁were ▁killed ▁or ▁ex iled ▁in ▁the ▁after math . ▁ ▁Early ▁Japanese ▁invas ions ▁ ▁Through out ▁Korean ▁history , ▁there ▁was ▁frequent ▁pi racy ▁on ▁sea ▁and ▁brig and age ▁on ▁land . ▁The ▁only ▁purpose ▁for ▁the ▁Jose on ▁n avy ▁was ▁to ▁secure ▁the ▁mar itime ▁trade ▁against ▁the ▁w ok ou .