▁prec ursor ▁of ▁the ▁Q ing ▁dynast y ), ▁which ▁would ▁now ▁become ▁an ▁immediate ▁threat ▁to ▁the ▁M ing ▁dynast y . ▁By ▁this ▁time , ▁after ▁ 2 0 ▁years ▁of ▁imperial ▁d ys function , ▁the ▁M ing ▁army ▁was ▁in ▁ste ep ▁decl ine . ▁While ▁the ▁J urch ens ▁were ▁fewer ▁in ▁number , ▁they ▁were ▁fier cer ▁and ▁better ▁f igh ters . ▁For ▁instance , ▁in ▁the ▁Battle ▁of ▁N un ▁Er ▁Ch u ▁in ▁ 1 6 1 9 , ▁the ▁M ing ▁government ▁sent ▁out ▁an ▁army ▁of ▁ 2 0 0 , 0 0 0 ▁against ▁the ▁Later ▁Jin ▁army ▁of ▁ 6 0 , 0 0 0 , ▁with ▁Nur ha ci ▁cont rolling ▁six ▁b ann ers ▁and ▁ 4 5 , 0 0 0 ▁troops ▁as ▁the ▁central ▁attack , ▁while ▁D ai š an ▁and ▁Hu ang ta iji ▁each ▁controlled ▁ 7 , 5 0 0 ▁troops ▁and ▁one ▁b anner ▁and ▁attacked ▁from ▁the ▁sides . ▁After ▁five ▁days ▁of ▁battle , ▁the ▁M ing ▁army ▁suffered ▁cas ual ties ▁of ▁over ▁ 1 0 0 , 0 0 0 , ▁with ▁ 7 0 % ▁of ▁their ▁food ▁supply ▁st olen . ▁ ▁The ▁O ir ats ▁transm itted ▁some ▁gar bled ▁and ▁incorrect ▁descri ptions ▁of ▁China ▁to ▁the ▁Rus si ans ▁in ▁ 1 6 1 4 , ▁the ▁name ▁" T a ib yk ank an " ▁was ▁used ▁to ▁refer ▁to ▁the