▁Est an is la o ▁López ▁and ▁Francisco ▁Ram í rez , ▁defeated ▁a ▁dimin ished ▁Direct orial ▁army , ▁ending ▁the ▁central ized ▁government ▁of ▁the ▁United ▁Provin ces ▁and ▁establish ing ▁a ▁federal ▁agreement ▁with ▁Buenos ▁Aires ▁Province . ▁ ▁The ▁league ▁was ▁dissol ved ▁after ▁its ▁constitu ent ▁provinces ▁rejo ined ▁the ▁United ▁Provin ces , ▁now ▁under ▁a ▁federal ▁prov is ional ▁organisation , ▁and ▁after ▁the ▁invasion ▁of ▁the ▁Band a ▁Oriental ▁by ▁Brazil ian - Port ug uese ▁emp ire ▁and ▁the ▁defeat ▁of ▁Art ig as . ▁At ▁its ▁largest ▁extent , ▁the ▁League ▁extended ▁over ▁the ▁territ ories ▁of ▁present - day ▁Uruguay , ▁the ▁southern ▁Brazil ian ▁state ▁of ▁Rio ▁Grande ▁do ▁Sul ▁and ▁the ▁Argent ine ▁provinces ▁of ▁Entre ▁R íos , ▁Santa ▁Fe , ▁Cor ri entes , ▁M ision es ▁and ▁C ór dob a . ▁It ▁was ▁instrument al ▁in ▁the ▁Gu aran í ▁participation ▁on ▁the ▁revolution ary ▁cause ). ▁ ▁Although ▁the ▁country ▁was ▁intended ▁to ▁extend ▁throughout ▁modern - day ▁Argentina , ▁its ▁leadership ▁was ▁based ▁on ▁Pur ificación ▁and ▁the ▁Eastern ▁Bank ▁of ▁the ▁Uruguay ▁river . ▁Therefore , ▁it ▁is ▁sometimes ▁considered ▁a ▁prede cess or ▁state ▁of ▁modern ▁Uruguay . ▁ ▁History ▁ ▁On ▁May ▁ 1 3 , ▁ 1 8 1 0 , ▁the ▁arrival ▁of ▁a ▁British ▁fr ig ate ▁in ▁Monte video ▁confirmed ▁the ▁rum ors ▁circul ating ▁in ▁Buenos ▁Aires : ▁France , ▁led ▁by ▁Emperor ▁Napoleon , ▁had