x ▁Ald ao ▁and ▁Naz ario ▁Ben av í de z , ▁govern ors ▁of ▁the ▁provinces ▁of ▁M endo za ▁and ▁San ▁Juan , ▁in ▁the ▁ep ic ▁Battle ▁of ▁Ang aco , ▁one ▁of ▁the ▁blood iest ▁of ▁the ▁Argent ine ▁civil ▁wars . ▁After ▁A cha ▁had ▁won , ▁he ▁occupied ▁the ▁city ▁of ▁San ▁Juan , ▁but ▁two ▁days ▁later ▁was ▁defeated ▁by ▁Ben av í de z ▁in ▁the ▁Battle ▁of ▁La ▁Ch ac ar illa , ▁and ▁was ▁shot ▁by ▁order ▁of ▁Ald ao . ▁Lam ad rid ▁re occup ied ▁San ▁Juan ▁with ▁ 1 , 5 0 0 ▁troops , ▁and ▁from ▁there ▁went ▁to ▁M endo za , ▁entering ▁the ▁city ▁on ▁ 3 ▁September ▁ 1 8 4 1 , ▁where ▁he ▁was ▁elected ▁governor . ▁ ▁Development ▁Three ▁weeks ▁later ▁general ▁Áng el ▁P ach ec o ▁came ▁to ▁M endo za ▁accompanied ▁by ▁Ald ao , ▁with ▁ 2 , 0 0 0 ▁men , ▁ 1 , 5 0 0 ▁horses ▁and ▁corresponding ▁art illery . ▁Lam ad rid ▁went ▁out ▁to ▁meet ▁him ▁in ▁R ode o ▁del ▁Med io , ▁near ▁the ▁city , ▁on ▁the ▁morning ▁of ▁ 2 4 ▁September . ▁The ▁Federal ists ▁had ▁ 3 , 0 0 0 ▁men ▁and ▁the ▁Unit ari ans ▁only ▁ 1 , 6 0 0 . ▁The ▁arm ies ▁were ▁separated ▁by ▁a ▁flo oded ▁area ▁that ▁could ▁only ▁be ▁passed ▁by ▁a ▁bridge . ▁From ▁the