▁The ▁murder ▁of ▁Fac undo ▁Qu iro ga ▁in ▁C ór dob a ▁increased ▁this ▁belief , ▁so ▁the ▁legisl ature ▁appointed ▁him ▁governor ▁in ▁ 1 8 3 5 , ▁with ▁the ▁sum ▁of ▁public ▁power . ▁ ▁Ros as ▁faced ▁a ▁difficult ▁military ▁threat ▁during ▁first ▁years ▁of ▁his ▁second ▁administration . ▁First , ▁the ▁Peru – B ol iv ian ▁Confeder ation ▁in ▁the ▁North ▁declared ▁the ▁War ▁of ▁the ▁Confeder ation ▁against ▁Argentina ▁and ▁Chile . ▁Then , ▁France ▁made ▁diplom atic ▁requests ▁which ▁were ▁denied ▁by ▁Ros as ▁and ▁subsequently ▁im posed ▁a ▁naval ▁block ade ▁as ▁a ▁result . ▁France ▁inv aded ▁Martín ▁García ▁island ▁and ▁de posed ▁the ▁Uruguay an ▁president ▁Manuel ▁Ori be , ▁appoint ing ▁instead ▁the ▁loyal ▁F ruct u oso ▁River a , ▁who ▁declared ▁war ▁on ▁Argentina ▁in ▁support ▁of ▁France . ▁Dom ingo ▁C ull en , ▁from ▁Santa ▁Fe , ▁promoted ▁the ▁se cess ion ▁of ▁all ▁provinces , ▁leaving ▁Buenos ▁Aires ▁alone ▁in ▁the ▁conflict . ▁Ber ón ▁de ▁A str ada , ▁from ▁Cor ri entes , ▁opposed ▁Ros as ▁as ▁well , ▁and ▁Juan ▁Lav alle ▁organized ▁an ▁army ▁to ▁take ▁Buenos ▁Aires . ▁The ▁ran ch ers ▁mut in ied ▁in ▁Ch as com ús ▁and ▁organized ▁the ▁" Fre emen ▁of ▁the ▁South " ▁milit ia . ▁ ▁Ros as ▁over c ame ▁all ▁these ▁thre ats . ▁The ▁Peru – B ol iv ian ▁Confeder ation ▁was ▁defeated ▁by ▁Chile ▁and ▁ceased ▁to