▁( d ied ▁ 2 2 2 ▁A . D .), ▁cour tes y ▁name ▁W en jin , ▁was ▁a ▁military ▁officer ▁of ▁the ▁state ▁of ▁Sh u ▁Han ▁in ▁the ▁Three ▁Kingdom s ▁period ▁of ▁China . ▁ ▁Life ▁Z hang ▁Nan ▁was ▁originally ▁from ▁J ing ▁Province ▁( cover ing ▁present - day ▁H ube i ▁and ▁Hun an ). ▁He ▁served ▁as ▁a ▁military ▁officer ▁under ▁Li u ▁Bei , ▁the ▁found ing ▁em peror ▁of ▁the ▁state ▁of ▁Sh u ▁Han ▁in ▁the ▁Three ▁Kingdom s ▁era , ▁and ▁accompanied ▁him ▁to ▁Y i ▁Province ▁( cover ing ▁present - day ▁S ich uan ▁and ▁Ch ong q ing ) ▁in ▁the ▁early ▁ 2 1 0 s . ▁ ▁In ▁ 2 2 1 , ▁Li u ▁Bei ▁attacked ▁his ▁former ▁al ly , ▁Sun ▁Qu an ▁( the ▁found ing ▁em peror ▁of ▁Eastern ▁Wu ), ▁after ▁the ▁latter ▁broke ▁their ▁al liance ▁and ▁seized ▁his ▁territ ories ▁in ▁J ing ▁Province ▁and ▁executed ▁his ▁general ▁Gu an ▁Yu . ▁Z hang ▁Nan ▁participated ▁in ▁this ▁campaign , ▁which ▁led ▁to ▁the ▁Battle ▁of ▁X ia oting ▁( or ▁Battle ▁of ▁Y iling ) ▁of ▁ 2 2 1 – 2 2 2 , ▁and ▁was ▁appointed ▁as ▁the ▁V angu ard ▁( 前 部 <0xE7> <0x9D> <0xA3> ) ▁of ▁the ▁Sh u ▁army . ▁In ▁the ▁summer ▁of ▁ 2 2 2 , ▁Sun ▁Qu an ' s ▁forces , ▁led ▁by ▁Lu ▁X un