Uruguay's independence recognized, ending the Cisplatine War (1828)

The Preliminary Peace Convention, signed on 27 August 1828, ended the Cisplatine War by recognizing the independence of the Banda Oriental. British mediation facilitated the treaty between the Empire of Brazil and the United Provinces, establishing the territory as an independent state amidst a military stalemate.

Episodes

Background and detail

Background. The Cisplatine War arose from conflicts over the Banda Oriental, annexed by Brazil as Cisplatina. By 1828, the war reached a stalemate, with Argentine land forces unable to capture major cities and Brazilian forces lacking manpower for full offensives. British interest in resolving trade impediments from the blockade of Buenos Aires drove diplomatic efforts.

British Mediation. Peace talks began on 20 February 1828 under British mediation. Diplomat John Ponsonby proposed an independent Uruguay to placate both Brazil and Argentina, addressing Brazilian sovereignty demands over Missões Orientais and navigation rights. Despite initial Argentine opposition, Ponsonby convinced them that continuing the war was financially unsustainable.

The Convention. Representatives from Brazil and the United Provinces met in Rio de Janeiro between 11 and 27 August 1828. The resulting Preliminary Peace Convention accorded independence to Uruguay, ending hostilities. This treaty acknowledged the independence of Cisplatina, later known as the Eastern Republic of Uruguay, under British mediation.

People involved

Sources

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.