
The ''Treinta y Tres Orientales'' (English: Thirty-Three Orientals or Thirty-Three Easterners) was a revolutionary group led by
Juan Antonio Lavalleja
Juan Antonio Lavalleja y de la Torre (June 24, 1784 – October 22, 1853) was an Uruguayan Libertadores, libertador, revolutionary, military general, and political figure. He was born in Minas, Uruguay, Minas, in a region now named after him ...
and
Manuel Oribe
Manuel Ceferino Oribe y Viana (August 26, 1792 – November 12, 1857) was the 2nd Constitutional president of Uruguay and founder of Uruguay's National Party, the oldest Uruguayan political party and considered one of the two Uruguayan "tr ...
against the
Empire of Brazil
The Empire of Brazil was a 19th-century state that broadly comprised the territories which form modern Brazil and Uruguay until the latter achieved independence in 1828. The empire's government was a Representative democracy, representative Par ...
. Their actions culminated in the foundation of modern
Uruguay
Uruguay, officially the Oriental Republic of Uruguay, is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast, while bordering the Río de la Plata to the south and the A ...
. They became famous by the name of the Treinta y Tres Orientales when, in 1825, they began an
insurrection for the independence of
Oriental Province, a historical territory encompassing modern Uruguay and part of modern Brazilian
Rio Grande do Sul
Rio Grande do Sul (, ; ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative units of Brazil#List, fifth-most populous state and the List of Brazilian s ...
State, from Brazilian control.
The group was also known as the Thirty Three Immortals.
Background
Between 1816 and 1820, the
United Kingdom of Portugal, Brazil and the Algarves invaded and occupied the post-Spanish ''
Provincia Oriental''. These Luso-Brazilian forces
easily defeated the resistance of the forces of
José Gervasio Artigas
José Gervasio Artigas Arnal (; June 19, 1764 – September 23, 1850) was a soldier and statesman who is regarded as a national hero in Uruguay and the father of Uruguayan nationhood.
Born in Montevideo, Artigas enlisted in the Spanish ...
who, when routed, had to abandon the province in 1820, and went into self-exile in
Paraguay
Paraguay, officially the Republic of Paraguay, is a landlocked country in South America. It is bordered by Argentina to the Argentina–Paraguay border, south and southwest, Brazil to the Brazil–Paraguay border, east and northeast, and Boli ...
.
In February 1824 Oriental Province was annexed under the name ''Cisplatina'' Province by newly independent Brazil. It had held the same name under the former Portuguese colonial administration. Previously, a separatist movement (1822–1823) directed by various partisans of the
United Provinces of the Río de la Plata
The United Provinces of the Río de la Plata (), earlier known as the United Provinces of South America (), was a name adopted in 1816 by the Congress of Tucumán for the region of South America that declared independence in 1816, with the Sove ...
(present day
Argentina
Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...
) had been subdued by the Brazilians. The goal of the doomed movement had been the unification of Cisplatina with the United Provinces.
Organization
One of the military leaders of the partisans, Lavalleja, who had fought together with
Artigas against the Portuguese and Brazilians, organized a new military expedition, from
Buenos Aires Province
Buenos Aires, officially the Buenos Aires Province, is the largest and most populous Provinces of Argentina, Argentine province. It takes its name from the city of Buenos Aires, the capital of the country, which used to be part of the province an ...
to Cisplatina Province. The goal was again to expel the Brazilians and unite Cisplatina Province with the United Provinces of the Río de la Plata.
The expedition relied on the help of some ranchers and beef-curers from Buenos Aires Province who saw the Brazilian occupation of Cisplatina Province as a danger to their interests. The beef-curers had seen their regional markets impaired through competition with their neighbors at
Rio Grande do Sul
Rio Grande do Sul (, ; ; "Great River of the South") is a Federative units of Brazil, state in the South Region, Brazil, southern region of Brazil. It is the Federative units of Brazil#List, fifth-most populous state and the List of Brazilian s ...
, who were supplied with cattle from Cisplatina.
Juan Manuel de Rosas
Juan Manuel José Domingo Ortiz de Rozas y López de Osornio (30 March 1793 – 14 March 1877), nicknamed "Restorer of the Laws", was an Argentine politician and army officer who ruled Buenos Aires Province and briefly the Argentine Confedera ...
, a characteristic member of this group, became an important financier of the anti-Brazilian movement.
Landing
On April 1, 1825, an advance party led by
Manuel Oribe
Manuel Ceferino Oribe y Viana (August 26, 1792 – November 12, 1857) was the 2nd Constitutional president of Uruguay and founder of Uruguay's National Party, the oldest Uruguayan political party and considered one of the two Uruguayan "tr ...
set sail from the port of
San Isidro and landed at the ''Brazo Largo'' island on the
Paraná river
The Paraná River ( ; ; ) is a river in south-central South America, running through Brazil, Paraguay, and Argentina for some ."Parana River". Encyclopædia Britannica. Encyclopædia Britannica Online.
Encyclopædia Britannica Inc., 2012. Web. ...
. The bulk of the men left soon afterwards, but due to bad weather could only join them on April 15.
After nightfall, on April 18, Lavalleja and his men advanced carefully among the isles of the
Paraná Delta, evading the vigil of the Brazilian
flotilla. They crossed the
Río Uruguay in two boats and disembarked at
Agraciada Beach, also known as "Arenal Grande", at dawn on April 19. There they planted what would become known as the ''Bandera de los Treinta y Tres Orientales'' (
Flag of the Thirty-Three Easterners), a flag of blue, white, and red horizontal bars. These colors had been traditional since the times of Artigas, not only in Oriental Province but also in others of the Río de la Plata region.
Long afterwards, in 1877, the event would be portrayed by the painter Juan Manuel Blanes, in ''El Juramento de los Treinta y Tres Orientales'' (Oath of the Thirty-Three Orientlas), one of the images most deeply inscribed in the historical memory of Uruguayans. Blanes often addressed historical themes in his works, and in this case achieved detailed renderings of the protagonists' faces, interviewing some survivors and taking extensive notes.
Campaign

The military expedition of the Treinta y Tres proceeded to attract countryside inhabitants to the cause of freedom from the Brazilians, and made its way to
Montevideo
Montevideo (, ; ) is the capital city, capital and List of cities in Uruguay, largest city of Uruguay. According to the 2023 census, the city proper has a population of 1,302,954 (about 37.2% of the country's total population) in an area of . M ...
, where it arrived on May 20, 1825. On June 14, in the town of
La Florida it installed a
provisional government
A provisional government, also called an interim government, an emergency government, a transitional government or provisional leadership, is a temporary government formed to manage a period of transition, often following state collapse, revoluti ...
which in turn held an election of
representatives. This was known as Representatives' Hall, or more commonly as the Florida Assembly. The goal of the assembly was to rewrite the laws of Oriental Province.
On August 25 the assembly declared the independence of Oriental Province from Brazil, and its allegiance to the United Provinces of the Río de la Plata. The United Provinces recognized the incorporation of Oriental Province on October 24, 1825. This instigated a declaration of war by the
Empire of Brazil
The Empire of Brazil was a 19th-century state that broadly comprised the territories which form modern Brazil and Uruguay until the latter achieved independence in 1828. The empire's government was a Representative democracy, representative Par ...
in December of the same year. The
Cisplatine War
The Cisplatine War was an armed conflict fought in the 1820s between the Empire of Brazil and the United Provinces of the Río de la Plata over control of Brazil's Cisplatina province. It was fought in the aftermath of the United Provinces' an ...
had begun.
This conflict lasted until August 1828. After mediation by
Viscount Ponsonby, a
British
British may refer to:
Peoples, culture, and language
* British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies.
* British national identity, the characteristics of British people and culture ...
diplomat, Oriental Province was established as a
state
State most commonly refers to:
* State (polity), a centralized political organization that regulates law and society within a territory
**Sovereign state, a sovereign polity in international law, commonly referred to as a country
**Nation state, a ...
independent of both the United Provinces and the Brazilian Empire. This accord was the foundation of modern
Uruguay
Uruguay, officially the Oriental Republic of Uruguay, is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast, while bordering the Río de la Plata to the south and the A ...
. Known as the
Preliminary Peace Convention, it was affirmed on August 27, 1828.
Number and identities of the Treinta y Tres Orientales
The true number of the group has been the object of controversy, based on the existence of various lists of members, published between 1825 and 1832. While thirty-three is the officially accepted number, the names differ from list to list; it is unclear whether these differing names may be nicknames of the true members. According to
Jacinto Carranza, who compared extant lists for his 1946 book ''¿Cuántos eran los Treinta y Tres?'' (How Many Were the Thirty-Three?),
Santiago Gadea is a name appearing in every list.
Although called Orientales, not everyone was from Oriental Province. Among them were various
Argentines
Argentines, Argentinians or Argentineans are people from Argentina. This connection may be residential, legal, historical, or cultural. For most Argentines, several (or all) of these connections exist and are collectively the source of their ...
from the isles of
Paraná, as well as Paraguayans and one person born in
Mozambique
Mozambique, officially the Republic of Mozambique, is a country located in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Eswatini and South Afr ...
.
See also
*
Flag of the Treinta y Tres
*
Agraciada Beach#Historical association
*
Cisplatine War
The Cisplatine War was an armed conflict fought in the 1820s between the Empire of Brazil and the United Provinces of the Río de la Plata over control of Brazil's Cisplatina province. It was fought in the aftermath of the United Provinces' an ...
*
José Gervasio Artigas
José Gervasio Artigas Arnal (; June 19, 1764 – September 23, 1850) was a soldier and statesman who is regarded as a national hero in Uruguay and the father of Uruguayan nationhood.
Born in Montevideo, Artigas enlisted in the Spanish ...
*
Artigas flag
*
Empire of Brazil
The Empire of Brazil was a 19th-century state that broadly comprised the territories which form modern Brazil and Uruguay until the latter achieved independence in 1828. The empire's government was a Representative democracy, representative Par ...
*
Juan Antonio Lavalleja
Juan Antonio Lavalleja y de la Torre (June 24, 1784 – October 22, 1853) was an Uruguayan Libertadores, libertador, revolutionary, military general, and political figure. He was born in Minas, Uruguay, Minas, in a region now named after him ...
*
History of Uruguay
*
Treinta y Tres
*
Virgin of the Thirty-Three
References
External links
{{Uruguay topics
Cisplatine War
1825 in South America
1825 in Uruguay