Cisplatine War in the context of "Portuguese conquest of the Banda Oriental"

The Empire of Brazil (Portuguese: Império do Brasil) 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 parliamentary constitutional monarchy under the rule of Emperors Pedro I and his son Pedro II. A colony of the Kingdom of Portugal, Brazil became the seat of the Portuguese Empire in 1808, when the Portuguese Prince regent, later King Dom John VI, fled from Napoleon's invasion of Portugal and established himself and his government in the Brazilian city of Rio de Janeiro. John VI later returned to Portugal, leaving his eldest son and heir-apparent, Pedro, to rule the Kingdom of Brazil as regent. On 7 September 1822, Pedro declared the independence of Brazil and, after waging a successful war against his father's kingdom, was acclaimed on 12 October as Pedro I, the first Emperor of Brazil. The new country was huge, sparsely populated, and ethnically diverse.

Unlike most of the neighboring Hispanic American republics, Brazil had political stability, vibrant economic growth, constitutionally guaranteed freedom of speech, and respect for civil rights of its subjects, albeit with legal restrictions on women and slaves, the latter regarded as property and not citizens. The Empire's bicameral parliament was elected under comparatively democratic methods for the era, as were the provincial and local legislatures. This led to a long ideological conflict between Pedro I and a sizable parliamentary faction over the role of the monarch in the government. He also had to face other obstacles. The unsuccessful Cisplatine War against the neighboring United Provinces of the Río de la Plata in 1828 led to the secession of the province of Cisplatina (later to become Uruguay). In 1826, despite his role in Brazilian independence, he became the king of Portugal; he abdicated the Portuguese throne in favor of Maria, his eldest daughter. Two years later, she was usurped by Pedro I's younger brother Miguel. Unable to deal with both Brazilian and Portuguese affairs, Pedro I abdicated his Brazilian throne on 7 April 1831 and immediately departed for Europe to restore his daughter to the Portuguese throne.

The Constitution of Uruguay (Constitución de la República Oriental del Uruguay) is the supreme law of Uruguay. Its first version was written in 1830 and its last amendment was made in 2004.

Uruguay's first constitution was adopted in 1830, following the conclusion of the three-year-long Cisplatine War in which Argentina and Uruguay acted as a federation: the United Provinces of the Río de la Plata. Mediated by the United Kingdom, the 1828 Treaty of Montevideo allowed to build the foundations for a Uruguayan state and constitution. It has been reformed in 1918, 1934, 1942, 1952 and 1967, but it still maintains several articles from its first version of 1830.

The Brazilian Navy (Portuguese: Marinha do Brasil) is the naval service branch of the Brazilian Armed Forces. It is responsible for conducting naval operations, providing maritime security, and enforcing laws and regulations both at sea and within the country's extensive riverine and littoral zones. The Brazilian Navy is one of the world's few blue-water naval forces, capable of regional power projection beyond the country's territorial water and deep into the Atlantic Ocean.

The navy was involved in the Brazilian war of independence and subsequently received most of Portugal's naval forces and bases in South America. The government maintained a sizeable naval force in the initial decades following independence. The navy was later involved in the Cisplatine War, the River Plate conflicts, the Paraguayan War as well as other sporadic rebellions that marked Brazilian history.

The Preliminary Peace Convention was a bilateral treaty signed on 27 August 1828 between the Empire of Brazil and the United Provinces of the Río de la Plata, after British mediation, that put an end to the Cisplatine War and recognized the independence of Uruguay.

Called the Preliminary Peace Convention as a result of the meetings held by representatives from the Empire of Brazil and the United Provinces — the predecessor state for Argentina — between 11 and 27 August 1828 in Rio de Janeiro, Brazil. This convention, or treaty, accorded independence to Uruguay in respect to Brazil and Argentina. Uruguay's independence would be definitively sealed on 4 October of the same year when, in Montevideo, the signing nations ratified the treaty.

The First Reign was the period of Brazilian history in which Pedro I ruled Brazil as Emperor. It began on September 7, 1822, when Brazil's independence was proclaimed, and ended on April 7, 1831, when Pedro I abdicated the Brazilian throne.

When Pedro I declared independence, defeating those who were still loyal to Portugal, he achieved great prestige and power. In 1823, he convened the Constituent Assembly which, amid great disagreements between parliamentarians and the Emperor, was dissolved in the Night of Agony. The emperor then convened a Council of State to draft Brazil's first constitution, which was enacted the following year. The document brought centralizing aspects along with the controversial moderating power, which contributed to growing discontent and revolts, including the outcome of the Cisplatine War and the assassination of Líbero Badaró, a well-known journalist. These incidents diminished the emperor's popularity and led to incidents such as a trip to Minas Gerais, where Pedro I was harassed by the locals.