# The Chronicle of Uruguay: From the Charrua of the Banda Oriental and a contested frontier between the Spanish and Portuguese empires to Artigas and the Thirty-Three Orientals, the 1828 buffer state between Argentina and Brazil, the reforms of Batlle y Ordonez, the dictatorship of 1973-1985, and a stable, progressive democracy. History of Uruguay: From the Charrua of the Banda Oriental and a contested frontier between the Spanish and Portuguese empires to Artigas and the… Canonical: https://terralore.co/country/URY/chronicle Updated: 2026-06-15 Founding: Independence settled by the 1828 Treaty of Montevideo — 1828. Modern Uruguay was born of the 1825-1828 war between the United Provinces of the Rio de la Plata (Argentina) and the Empire of Brazil for control of the Banda Oriental, which Brazil had annexed as the Cisplatine Province. The struggle was reignited on 25 August 1825, when the Thirty-Three Orientals led by Juan Antonio Lavalleja, having landed on the coast that April, proclaimed the province's separation from Brazil and union with the United Provinces. Neither neighbour could prevail, and under British mediation the Preliminary Peace Convention, signed in 1828 and known as the Treaty of Montevideo, ended the war by establishing the disputed territory as an independent buffer state, the Oriental Republic of Uruguay. The first national constitution was sworn in 1830. Uruguay's history begins with the Charrua and other Indigenous peoples of the grasslands north of the Rio de la Plata, in a land the Spanish called the Banda Oriental, the eastern bank of the river. For two centuries it was a contested borderland between the Spanish and Portuguese empires, marked by the smuggling port of Colonia del Sacramento and the Spanish founding of Montevideo in 1724-1726. Independence came hard: the federalist hero Jose Gervasio Artigas, Portuguese and Brazilian occupation, the landing of the Thirty-Three Orientals and the declaration of 25 August 1825, and the British-brokered settlement of 1828 that created Uruguay as a buffer state between its giant neighbours. After a turbulent nineteenth century of civil war between Blancos and Colorados, the reforms of Jose Batlle y Ordonez made Uruguay an early welfare-state democracy, before a military dictatorship from 1973 to 1985 gave way to the stable, progressive republic of today. This file carries the chronicle's sourced event record — every event with its year, summary and source keys (resolved under References below). The full reading narrative lives on the canonical page. ## The Charrua and the Banda Oriental — Pre-1516 - 1680 Long before European sails appeared, the grasslands north of the Rio de la Plata were home to the Charrua and other Indigenous peoples; the Spanish who explored the estuary from 1516 found little to detain them, and for nearly two centuries the Banda Oriental remained an empty, contested frontier. - by c. 3000 BCE: **Indigenous peoples of the grasslands** — The Charrua and other hunting and gathering peoples occupy the plains north of the Rio de la Plata over many millennia, well before any European arrival. [britannica-charrua, britannica-uruguay] - 1516 CE: **Solis reaches the Rio de la Plata** — The Spanish navigator Juan Diaz de Solis explores the estuary and is killed near its eastern shore; finding no gold, Spain largely ignores the Banda Oriental for nearly two centuries. [britannica-uruguay] - early 1600s: **Cattle turn the plains to wealth** — Cattle and horses introduced by early expeditions multiply across the grasslands into vast feral herds, drawing gauchos, hide-hunters and contrabandists to the frontier. [britannica-uruguay] ## The Contested Frontier: Colonia and Montevideo — 1680 - 1810 Portugal's founding of Colonia del Sacramento in 1680 opened a century of rivalry over the Banda Oriental; to block the Portuguese, Spain expelled their garrison and founded Montevideo in 1724-1726, creating the fortified port around which the nation would grow. - 1680 CE: **Portugal founds Colonia del Sacramento** — Portuguese soldiers establish Colonia opposite Buenos Aires; it becomes a strategic outpost and smuggling centre, changing hands between the crowns for over a century. [britannica-colonia, unesco-colonia] - 1724 CE: **Spain expels the Portuguese at Montevideo** — A Spanish force under Bruno Mauricio de Zabala drives out a Portuguese garrison that had begun fortifying the bay of Montevideo, opening the way for a Spanish town. [britannica-montevideo, britannica-zabala] - 1726 CE: **Founding of Montevideo** — Zabala formally establishes Montevideo as a fortified Spanish port to counter Portuguese expansion; it grows into the chief stronghold of the Banda Oriental. [britannica-montevideo, britannica-zabala] - 1776 CE: **Viceroyalty of the Rio de la Plata** — Spain creates the new viceroyalty centred on Buenos Aires, drawing the Banda Oriental into its administration and stoking eastern resentment of the centralising capital. [britannica-uruguay] - inscribed 1995: **Colonia listed by UNESCO** — The historic quarter of Colonia del Sacramento, blending Portuguese, Spanish and post-colonial architecture, is inscribed as a World Heritage site. [unesco-colonia] Figures: - Bruno Mauricio de Zabala (1682-1736) — Spanish colonial governor. Governor of Buenos Aires who expelled the Portuguese from the bay of Montevideo and founded the fortified Spanish town there in the 1720s to block Portuguese expansion into the Banda Oriental. ## Artigas, the Thirty-Three, and Independence — 1811 - 1830 The revolutions of the Rio de la Plata raised the gaucho leader Jose Gervasio Artigas and his federal vision; defeated by Portuguese invasion, his cause was taken up by the Thirty-Three Orientals, whose 1825 rising and the British-brokered settlement of 1828 finally made Uruguay a nation. - 1814-1815: **Artigas and the Federal League** — Jose Gervasio Artigas leads the Orientals against Spain and builds a federal league of provinces, championing autonomy against Buenos Aires across the Banda Oriental and beyond. [britannica-artigas, britannica-uruguay] - 1816-1820: **Portuguese invasion and Artigas in exile** — Portuguese forces from Brazil invade the Banda Oriental; after three years of resistance Artigas is defeated in 1820 and goes into permanent exile in Paraguay. [britannica-artigas, britannica-uruguay] - 25 Aug 1825: **The Thirty-Three Orientals declare independence** — Juan Antonio Lavalleja and the Thirty-Three Orientals, having landed that April, proclaim separation from Brazil and union with the United Provinces, reigniting the war for the province. [britannica-lavalleja, britannica-uruguay-struggle] - 1828 CE: **Treaty of Montevideo creates Uruguay** — Under British mediation, the Preliminary Peace Convention ends the Argentine-Brazilian war by establishing the contested territory as the independent buffer state of Uruguay. [statedept-uruguay, britannica-uruguay-struggle] - 18 July 1830: **First constitution sworn** — The Oriental Republic of Uruguay adopts its first national constitution, formally organising the new state. [britannica-uruguay-struggle] Figures: - Jose Gervasio Artigas (1764-1850) — Father of Uruguayan independence. Gaucho turned revolutionary who led the Orientals against Spain and championed federalism against Buenos Aires. Defeated by Portuguese invasion and exiled to Paraguay in 1820, he is revered as the founding hero of the nation he did not live to see. - Juan Antonio Lavalleja (1784-1853) — Leader of the Thirty-Three Orientals. Revolutionary general who led the Thirty-Three Orientals in their 1825 landing and proclaimed independence from Brazil, beginning the war that ended with Uruguayan statehood in 1828. ## Blancos, Colorados, and the Guerra Grande — 1830 - 1903 The young republic was torn for decades by the rivalry of its two great parties, the Blancos and the Colorados; the Guerra Grande of 1839-1851 left Montevideo besieged for nine years, while the state extinguished the Charrua and slowly, after midcentury, settled into a prosperous cattle economy. - 11 Apr 1831: **Massacre of the Charrua at Salsipuedes** — Government forces ambush and massacre the Charrua at Salsipuedes, a campaign that destroyed them as a distinct people and is remembered as a foundational injustice. [britannica-charrua, britannica-uruguay-struggle] - 1839-1851: **The Guerra Grande** — The rivalry of Colorados and Blancos erupts into the Guerra Grande; the Blanco Oribe besieges Montevideo for nine years while the Colorados, aided by foreign legions, hold the city. [britannica-uruguay-struggle, britannica-uruguay] - 1851 CE: **End of the long war** — The Guerra Grande ends without outright victory, leaving Uruguay exhausted but independent and its two-party rivalry entrenched. [britannica-uruguay-struggle] - late 1800s: **Cattle economy and immigration** — Booming exports of hides, beef and wool, British-built railways, and waves of Italian and Spanish immigrants remake Montevideo and the countryside. [britannica-uruguay] ## Batlle y Ordonez and the Model Country — 1903 - 1958 Under Jose Batlle y Ordonez, twice president in the new century, Uruguay built one of the world's earliest welfare states, with the vote, the eight-hour day, free education and pensions, earning a reputation as the stable, prosperous Switzerland of South America. - 1903 CE: **Batlle y Ordonez becomes president** — Jose Batlle y Ordonez of the Colorado Party wins the presidency, beginning the reform era that would make Uruguay an early welfare-state democracy. [britannica-batlle, britannica-uruguay] - 1911-1915: **The great reforms** — In his second term Batlle enacts the eight-hour day, free education, pensions, nationalisations, abolition of the death penalty and church-state separation, founding the model welfare state. [britannica-batlle] - 1917 CE: **A new welfare constitution** — A reformed constitution entrenches the secular, democratic and social character of the Batllista republic, including a plural executive to check one-man power. [britannica-batlle, britannica-uruguay] - 1933 CE: **Terra's authoritarian interlude** — Amid the Great Depression President Gabriel Terra suspends the constitution in a self-coup; constitutional democracy is restored later in the decade. [britannica-uruguay] Figures: - Jose Batlle y Ordonez (1856-1929) — President and reformer. Twice president of Uruguay and its most influential statesman, he built one of the world's first welfare states, with labour laws, free education, pensions and church-state separation, earning his country the name Switzerland of South America. ## Dictatorship, Recovery, and Modern Uruguay — 1958 - present Economic decline and the Tupamaro insurgency drew the army into power; the dictatorship of 1973 to 1985 jailed and tortured thousands before democracy returned, and modern Uruguay has become a byword for stability and progressive reform. - c. 1963: **Rise of the Tupamaros** — The leftist urban guerrilla movement of the Tupamaros forms under Raul Sendic, turning to robberies, kidnappings and assassinations amid economic decline. [britannica-tupamaro, britannica-uruguay] - 27 June 1973: **Military takes power** — With the Tupamaros crushed and the country in crisis, the president dissolves parliament with military backing, beginning a civic-military dictatorship. [britannica-tupamaro, britannica-uruguay] - 1 Mar 1985: **Return to democracy** — After elections in 1984, Julio Maria Sanguinetti is inaugurated president, restoring civilian rule and freeing political prisoners under an amnesty. [britannica-uruguay, britannica-tupamaro] - 2004 CE: **Frente Amplio breaks the duopoly** — The left-wing Frente Amplio coalition wins the presidency for the first time, ending nearly two centuries of Colorado and Blanco dominance. [britannica-uruguay, britannica-mujica] - 2013 CE: **Cannabis and progressive reform** — Under President Jose Mujica, Uruguay legalises same-sex marriage and becomes the first country in the world to fully legalise and regulate cannabis. [britannica-mujica] Figures: - Jose Mujica (1935-2025) — Guerrilla, prisoner, and president. Former Tupamaro guerrilla who spent some thirteen years in prison under the dictatorship, then served as president from 2010 to 2015. Famed for his austere lifestyle, he oversaw landmark progressive reforms and became a symbol of modern Uruguay. Machine-readable claims — every event above as an addressable claim ID (TL:URY:event::) with its sources and a ready citation string: https://terralore.co/country/URY/chronicle.claims.json ## References - [britannica-uruguay] Uruguay — Encyclopaedia Britannica · https://www.britannica.com/place/Uruguay - [britannica-uruguay-struggle] Uruguay: The struggle for national identity — Encyclopaedia Britannica · https://www.britannica.com/place/Uruguay/The-struggle-for-national-identity - [britannica-charrua] Charrua — Encyclopaedia Britannica · https://www.britannica.com/topic/Charrua - [britannica-colonia] Colonia del Sacramento — Encyclopaedia Britannica · https://www.britannica.com/place/Colonia-del-Sacramento - [unesco-colonia] Historic Quarter of the City of Colonia del Sacramento — UNESCO World Heritage Centre · https://whc.unesco.org/en/list/747/ - [britannica-montevideo] Montevideo — Encyclopaedia Britannica · https://www.britannica.com/place/Montevideo - [britannica-zabala] Bruno Mauricio de Zabala — Encyclopaedia Britannica · https://www.britannica.com/biography/Bruno-Mauricio-de-Zabala - [britannica-artigas] Jose Gervasio Artigas — Encyclopaedia Britannica · https://www.britannica.com/biography/Jose-Gervasio-Artigas - [britannica-lavalleja] Juan Antonio Lavalleja — Encyclopaedia Britannica · https://www.britannica.com/biography/Juan-Antonio-Lavalleja - [statedept-uruguay] A Guide to the United States' History of Recognition, Diplomatic, and Consular Relations: Uruguay — U.S. Department of State, Office of the Historian · https://history.state.gov/countries/uruguay - [britannica-batlle] Jose Batlle y Ordonez — Encyclopaedia Britannica · https://www.britannica.com/biography/Jose-Batlle-y-Ordonez - [britannica-tupamaro] Tupamaro — Encyclopaedia Britannica · https://www.britannica.com/topic/Tupamaro - [britannica-mujica] Jose Mujica — Encyclopaedia Britannica · https://www.britannica.com/biography/Jose-Mujica Citation template: Terralore, "The Chronicle of Uruguay: From the Charrua of the Banda Oriental and a contested frontier between the Spanish and Portuguese empires to Artigas and the Thirty-Three Orientals, the 1828 buffer state between Argentina and Brazil, the reforms of Batlle y Ordonez, the dictatorship of 1973-1985, and a stable, progressive democracy.", terralore.co/country/URY/chronicle, retrieved .