Brazilian Empire in the context of "Brazilian War of Independence"

Dom Miguel I (26 October 1802 – 14 November 1866), known by several nicknames, was the King of Portugal between 1828 and 1834. He was the son of King John VI and Queen Carlota Joaquina.

Following his exile as a result of his actions in support of absolutism in the April Revolt (Abrilada) of 1824, Miguel returned to Portugal in 1828 as regent and fiancé of his niece who was Queen Maria II. As regent, he claimed the Portuguese throne in his own right, since according to the so-called Fundamental Laws of the Kingdom his older brother Pedro IV and therefore the latter's daughter had lost their rights from the moment that Pedro had made war on Portugal and become the sovereign of a foreign state (Brazilian Empire). This led to a difficult political situation, during which many people were killed, imprisoned, persecuted or sent into exile, and which culminated in the Portuguese Liberal Wars between authoritarian absolutists and progressive constitutionalists. In the end, Miguel was forced out from the throne and lived the last 32 years of his life in exile.

The decolonization of the Americas occurred over several centuries as most of the countries in the Americas gained their independence from European rule. The American Revolution was the first in the Americas, and the British defeat in the American Revolutionary War (1775–83) was a victory against a great power, aided by France and Spain, Britain's enemies. The French Revolution in Europe followed, and collectively these events had profound effects on the Spanish, Portuguese, and French colonies in the Americas. A revolutionary wave followed, resulting in the creation of several independent countries in Latin America. The Haitian Revolution (1791–1804), perhaps one of the most successful slave uprisings in history, resulted in the independence of the French slave colony of Saint-Domingue (now Haiti). The Peninsular War with France, which resulted from the Napoleonic occupation of Spain, caused Spanish Creoles in Spanish America to question their allegiance to Spain, stoking independence movements that culminated in various Spanish American wars of independence (1808–33), which were primarily fought between opposing groups of colonists and only secondarily against Spanish forces. At the same time, the Portuguese monarchy fled to Brazil during the French invasion of Portugal. After the royal court returned to Lisbon, the prince regent, Pedro, remained in Brazil and in 1822 successfully declared himself emperor of a newly independent Brazilian Empire.

Spain would lose all three of its remaining Caribbean colonies by the end of the 1800s. Santo Domingo declared its first independence from Spain in 1821. The independent state was renamed Republic of Spanish Haiti. Haiti conquered the region shortly afterwards in 1822. Two decades later, in 1844, independence was proclaimed for the second time, and the Dominican Republic was established. This triggered the Dominican War of Independence (1844–56). In 1861, however, Spain regained control of the territory, and the colony was reestablished. The Dominican Restoration War (1863–65), the second war of liberation, led to the second independence from Spain, and the Dominican Republic's third and final independence. Cuba fought for independence from Spain in the Ten Years' War (1868–78) and Little War (1879–80) and finally the Cuban War of Independence (1895–98). American intervention in 1898 became the Spanish–American War and resulted in the United States gaining Puerto Rico, Guam (which are still U.S. territories), and the Philippine Islands in the Pacific Ocean. Under military occupation, Cuba became a U.S. protectorate until its independence in 1902.

The Argentine Civil Wars (Spanish: Guerras civiles argentinas) were a series of civil conflicts of varying intensity that took place in the territories of Argentina from 1814 to 1853. Beginning concurrently with the Argentine War of Independence (1810–1818), the conflict prevented the formation of a stable governing body until the signing of the Argentine Constitution of 1853, followed by low-frequency skirmishes that ended with the Federalization of Buenos Aires in 1880.

The period saw heavy intervention from the Brazilian Empire, which fought against the state and provinces in multiple wars. Breakaway nations, former territories of the Viceroyalty, such as the Banda Oriental, Paraguay and Upper Peru, were involved to varying degrees. Foreign powers such as the British and French empires put heavy pressure on the fledgling nations during international war.