
The Viceroyalty of the Río de la Plata was the last to be organized and also the shortest-lived of the Viceroyalties of the Spanish Empire in the Americas.

José Gervasio Artigas Arnal is a national hero of Uruguay, sometimes called "the father of Uruguayan nationhood".

The Battle of Las Piedras was fought on May 18, 1811 as part of the Uruguayan struggle for independence.

The Battle of Montevideo was a battle between the British and Spanish Empires during the Napoleonic Wars, in which British forces captured the city of Montevideo. It formed part of the British invasions of the River Plate. Locally, it is remembered as the Siege of Montevideo.

The British invasions of the River Plate were a series of unsuccessful British attempts to seize control of areas in the Spanish colonial Viceroyalty of the Río de la Plata that were located around the Río de la Plata in South America — in present-day Argentina and Uruguay. The invasions took place between 1806 and 1807, as part of the Napoleonic Wars, when Spain was an ally of Napoleonic France.

Cisplatina Province or Cisplatine Province was a Brazilian province in existence from 1821 to 1828 created by the Luso-Brazilian annexation of the Oriental Province. From 1815 until 1822 Brazil was part of the United Kingdom of Portugal, Brazil and the Algarves. After the independence of Brazil and the formation of the Empire of Brazil the Cisplatine Province remained part of it. In 1828, following the Treaty of Montevideo, the Cisplatine Province became independent as Uruguay.

The Cisplatine War, also known as the Argentine-Brazilian War or in the Argentine and Uruguayan historiography as the Brazil War, was an armed conflict over an area known as Banda Oriental or the "Eastern Bank" in the 1820s between the United Provinces of the Río de la Plata and the Empire of Brazil in the aftermath of the United Provinces' independence from Spain.

Colonia del Sacramento is a city in southwestern Uruguay, by the Río de la Plata, facing Buenos Aires, Argentina. It is one of the oldest towns in Uruguay and capital of the Colonia Department. It has a population of around 27,000.

Colonial Brazil comprises the period from 1500, with the arrival of the Portuguese, until 1815, when Brazil was elevated to a kingdom in union with Portugal as the United Kingdom of Portugal, Brazil and the Algarves. During the early 300 years of Brazilian colonial history, the economic exploitation of the territory was based first on brazilwood extraction, which gave the territory its name; sugar production ; and finally on gold and diamond mining. Slaves, especially those brought from Africa, provided most of the work force of the Brazilian export economy after a brief period of Indian slavery to cut brazilwood.
The dissolution of the Viceroyalty of the Río de la Plata was the independence and breaking up of the Spanish colony in South America. Most of the viceroyalty is now part of Argentina, and other regions belong to Bolivia, Brazil, Paraguay and Uruguay.

Francisco Javier de Elío, was a Spanish soldier, governor of Montevideo and the last Viceroy of the Río de la Plata. He was also instrumental in the Absolutist repression after the restoration of Ferdinand VII as King of Spain. For this, he was executed during the Trienio Liberal.

Baltasar Hidalgo de Cisneros y de la Torre (1756–1829) was a Spanish naval officer born in Cartagena. He took part in the Battle of Cape St Vincent and the Battle of Trafalgar, and in the Spanish resistance against Napoleon's invasion in 1808. He was later appointed Viceroy of the Viceroyalty of the Río de la Plata, replacing Santiago de Liniers. He disestablished the government Junta of Javier de Elío and quelled the Chuquisaca Revolution and the La Paz revolution. An open cabildo deposed him as viceroy during the May Revolution, but he attempted to be the president of the new government junta, thus retaining power. The popular unrest in Buenos Aires did not allow that, so he resigned. He was banished back to Spain shortly after that, and died in 1829.

The event known as Second Siege of Montevideo took place between 1812 and 1814, when the patriotic troops led by José Rondeau besieged the city of Montevideo, still held by Spanish loyalists under the leadership of Gaspar de Vigodet. The siege was successful and marked the end of the Spanish presence in present-day Uruguay.

The Mutiny of Álzaga was an ill-fated attempt to remove Santiago de Liniers as viceroy of the Viceroyalty of the Río de la Plata. It took place on January 1, 1809, and it was led by the merchant Martín de Álzaga. The troops of Cornelio Saavedra, head of the Regiment of Patricians, defeated it and kept Liniers in power.

New Andalusia Governorate was one of the colonial governorates of the Spanish Empire, located in southern South America.

The Portuguese invasion of the Banda Oriental was a short-lived and failed attempt, beginning in 1811 and ending the following year, by the Portuguese Empire to annex the remaining territory of the Spanish Viceroyalty of the Río de la Plata.

The Portuguese conquest of the Banda Oriental was the armed-conflict that took place between 1816 and 1820 in the Banda Oriental, for control of what today comprises the whole of the Republic of Uruguay, the northern part of the Argentine Mesopotamia and southern Brazil. The four-year armed-conflict resulted in the annexation of the Banda Oriental into the United Kingdom of Portugal, Brazil and the Algarves as the Brazilian province of Cisplatina.

The First Siege of Montevideo took place between May and October 1811, when the troops of the United Provinces of the River Plate unsuccessfully besieged the city of Montevideo, still held by Spanish loyalists.

The United Provinces of the Río de la Plata, earlier known as the United Provinces of South America, a union of provinces in the Río de la Plata region of South America, emerged from the May Revolution in 1810 and the Argentine War of Independence of 1810–1818. It comprised most of the former Viceroyalty of the Río de la Plata dependencies and had Buenos Aires as its capital.