|Ratified||15 May 1850|
|Author(s)||Felipe Arana and Henry Southern|
|Signatories||Argentine Confederation and United Kingdom|
|Purpose||End the Anglo-French blockade of the Río de la Plata|
In the late 1840s, Argentina attempted to regulate traffic on the Paraná and Uruguay rivers, which impacted upon Anglo-French trade with the landlocked Paraguay. As a result Great Britain and France took military action in the Anglo-French blockade of the Río de la Plata. Although militarily successful, the victories against Argentine forces proved somewhat pyrrhic and both withdrew their forces and made treaties with Argentina. The peace treaty with the British is referred to as the Convention of Settlement; or the Arana-Southern Treaty.
France and Britain imposed a five-year long naval blockade on the Argentine Confederation ruled by Juan Manuel de Rosas. It was imposed in 1845 to support the Colorado Party in the Uruguayan Civil War and closed Buenos Aires to naval commerce. The Anglo-French navy trespassed into the internal waters of Argentina, in order to sell their products, as Rosas maintained a protectionist policy.
A key engagement in the blockade was the Battle of Vuelta de Obligado, where a combined British and French fleet forced their way into the Paraná River despite fierce resistance from the Argentine forces. Although the British and French forces crushed the Argentine forces, inflicting appalling casualties, the damage to the fleet was so extensive it stayed 40 days in Obligado making repairs. The expedition also proved a commercial failure as Paraguay proved to be less wealthy than expected and merchant ships were forced to return with many of their goods unsold. On their return the convoy again faced fierce resistance with several merchant ships sunk by cannon fire.
Whilst the British commander Ouseley requested additional forces to support a continued campaign a number of factors compelled the British to break with their French allies. The outcome of the expedition with the cost of victory and limited commercial opportunities changed British attitudes. Argentina owed a substantial debt to Barings Bank and suspension of payments due to the blockade had caused financial concerns. The Times had also printed an allegation that Ouseley had a personal financial interest in the blockade, causing a political scandal. Tomás Samuel Hood was sent to Buenos Aires with the instruction to negotiate a settlement with Rosas at all costs.
Although the Anglo-French force defeated Argentine forces, the cost of victory proved excessive in light of the ferocious resistance from the Argentines. As a result, the British sought to exit from the confrontation. Negotiations to end the conflict took nearly two years from 1848 to 1849. The final result was a peace treaty, the Arana-Southern Convention known as "Convention for the perfect restoration of friendly relations between the Argentine Confederation and Her Britannic Majesty" (Convención para restablecer las perfectas relaciones de amistad entre la Confederación Argentina y Su Majestad Britanica). It is also known as the "Convention of Settlement" or the “Arana-Southern Treaty”.
The treaty is viewed as a considerable triumph for the Argentine dictator General Rosas, as it was the first time the emerging South American nations were able to impose their will on two European empires (Britain and France). However, Rosas, as he had previously over the debt to Barings Bank, was prepared to concede Argentina's claim to the Falkland Islands in the Convention. The treaty settled "the existing differences" between the two nations.
The Convention was signed on 24 November 1849 and ratified on 15 May 1850. The treaty came into force after ratification. Details of the Arana-Southern Treaty were published by the Foreign and Commonwealth Office, volume 37.
The Anglo-French blockade of the Río de la Plata was followed by a rebellion of Justo José de Urquiza against Rosas. In February 1852 Urquiza defeated Rosas at the battle of Caseros and replaced him. Shortly after Urquiza's victory, Sir Charles Hotham, who took part in the early conflict, wrote to the Earl of Malmesbury (who had replaced Lord Palmerston) suggesting that it was time to consider breaking the Arana-Southern treaty and allow the free navigation of the Argentine rivers.
Urquiza held two interviews with the British representative Robert Gore, and in the second one he expressed his "plans to develop the resources of this great and rich country; the opening of the rivers to all nations, being the ships free to sail rivers and lift or drop cargo without having to stop previously in Buenos Aires."  The British focused their diplomatic efforts on obtaining a navigation agreement opening up the rivers for navigation. The Foreign office contacted France for this end, and both countries sent a diplomatic mission to Argentina in May 1852, led by Sir Charles Hotham and Michel de Saint-Georges, to put an end to the restrictions of the Arana-Southern Treaty and Arana-Lepredour Treaty. They had an interview with Urquiza in August, who agreed with their proposals.
During a lull in the siege and blockade of Buenos Aires, between 10 to 13 July 1853, Urquiza signed navigation agreements with agents of Great Britain, France and the United States which guaranteed the free navigation of Argentine inland rivers for foreign trade. In the opinion of James Scobie, his intention was to obtain a legal instrument to force these governments to protect freedom of navigation in the event that the province of Buenos Aires tried to cut the Confederate communications with the outside. The free navigation of the rivers was included in the Constitution of Argentina of 1853.
Relation to the Falkland Islands dispute
Between the re-establishment of British rule on the Falkland Islands in 1833 and the ratification of the treaty, Argentina sent annual protests to the British government by means of the Message to Congress, thereby maintaining Argentina's claim to the islands. Following the treaty, such protests ceased, and Argentina did not protest again diplomatically until 1888. The matter was not raised again before the Argentine Congress until 1941. The British government cites this change as evidence that "there is no question over the sovereignty of the Falkland Islands".
Lord Palmerston's comments
As negotiations on the Convention of Settlement progressed, it became apparent[to whom?] that Argentina was prepared to acquiesce Britain’s possession of the Falklands. On 27 July 1849, the British Foreign Secretary Lord Palmerston stated in the House of Commons:
… a claim had been made many years ago, on the part of Buenos Ayres, to the Falkland Islands, and had been resisted by the British Government. Great Britain had always disputed and denied the claim of Spain to the Falkland Islands, and she was not therefore willing to yield to Buenos Ayres what had been refused to Spain. 10 or 12 years ago the Falkland Islands, having been unoccupied for some time, were taken possession of by Great Britain, and a settlement had ever since been maintained there; and he thought it would be most unadvisable to revive a correspondence which had ceased by the acquiescence of one party and the maintenance of the other. 
Manuel Moreno, the Argentine ambassador wrote to Lord Palmerston protesting against this statement. The Moreno letter referred to Palmerston's description of "the acquiescence of one party and the maintenance of the other" and several recent protests including the Messages to Congress. Palmerston replied, stating that “I have always understood the matter in question to stand exactly in the way described by you in your letter.”
Lord Palmerston's letter is interpreted either as recognition that Argentina continued to protest or as a belief that the Falklands issue had been settled by Argentina’s acquiescence.
A number of historians have commented on the relation of the Convention of Settlement to the Falklands dispute. The Mexican diplomat and historian Carlos Pereyra considers that General Rosas gave up the claim to the Falklands in order to end Britain's involvement in the River Plate.[need quotation to verify]
Other Argentine historians have commented on the impact that the Convention of Settlement has upon Argentina's modern sovereignty claim, such as historian Alfredo R. Burnet-Merlín. Ernesto J. Fitte considers that the Argentine Confederation should have included its restitution in the treaty.
- Roger Lorton LLB(Hons), M.Phil (3 January 2012). "The Falkland Islands History". p. 67. Retrieved May 16, 2012.
- Roger Lorton LLB(Hons), M.Phil. "The Falkland Islands History & Timeline". Retrieved May 16, 2012.
- http://new.falklands.info/index.php?option=com_content&task=view&id=12&Itemid=35&limit=1&limitstart=3 Falklands.info Jason Lewis November 28, 2006
- The Falklands / Malvinas Case: Breaking the Deadlock in the Anglo-Argentine by Roberto C. Laver, page 123
- Humbert F. Burzio: “Rozas, el empréstito inglés de 1824 y las Islas Malvinas”, in Boletín del Centro Naval, Buenos Aires, January/February 1944, p. 647ff.
- AGN Sala X, 1-11-2. Argentine Chargé d’Affaires in London Manuel Moreno to Minister for Foreign Affairs Felipe Arana, dated 5 April 1843.
- Great Britain. Foreign and Commonwealth Office (1862). British and foreign state papers. H. M. S. O. pp. 11–. Retrieved 20 May 2012.
- "La misión Hotham-Saint Georges (agosto de 1852)" [The Hotham-Saint Georges mission (August 1852)]. Historia General de las Relaciones exteriores de la República Argentina (in Spanish). UCEMA. 2000. Retrieved May 10, 2012.
- Rosa, José María (1974). Historia Argentina (in Spanish) 6. Buenos Aires: Editorial del Oriente. pp. 11–12. "A principios de mayo la última misión anglofrancesa se ponía en ruta a Buenos Aires para borrar los tratados Southern y Lepredour"
- "La resistencia de Buenos Aires a la autoridad de Urquiza La ofensiva de Urquiza: el empréstito Buschenthal y el sitio y bloqueo de Buenos Aires" [The resistance of Buenos Aires to the authority of Urquiza (July 1853)]. Historia General de las Relaciones exteriores de la República Argentina (in Spanish). UCEMA. 2000. Retrieved May 16, 2012.
- UK Ambassador responds to "manifestly absurd" Argentine claims, United Kingdom Mission to the United Nations, 11 February 2012, accessed 16 May 2012.
- The Times, London, Saturday 28 July 1849, p. 2, col.6.
- Carlos Pereyra, Rosas y Thiers. La Diplomacia Europea en el Río de la Plata 1838–1856, new edition Buenos Aires 1944, pp. 217, 222.
- Verbatim record in Diario de Sesiones de la Cámara de Diputados, Año del Libertador General San Martín, 1950, Tomo II, Período Ordinario, 6 de julio-10 y 11 de agosto, Buenos Aires 1951 pp. 1095-1096.
- Alfredo R. Burnet-Merlín, Cuando Rosas quiso ser inglés [“When Rosas wanted to be British”], Buenos Aires, printed April 1974, June 1974 and October 1976, pp. 20-22.
- FITTE, Ernesto J. (1974). Crónicas del Atlántico Sur. Buenos Aires: Emecé Editores. p. 256. "En lo sucesivo, la Confederación Argentina no intentaría nada positivo por recuperar las Malvinas; fuera de ofrecerlas otra vez en canje, ahora al emisario Falconet de la casa Baring, de olvidarse después de incluir su devolución en la convención Arana-Southern de 1849 restableciendo la amistad apenas levantado el bloqueo inglés del Río de la Plata, y de dedicarle un parrafito en los mensajes anuales a la Legislatura, la cuestión de la reivindicación territorial no fue un asunto que llegó a quitarle el sueño a Juan Manuel de Rosas."
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