1821

Military 19th Century Latin America & Caribbean

Battle of Carabobo Secures Venezuelan Independence

After a decade of intermittent warfare against Spanish royalist forces, South American patriots under Simón Bolívar sought a decisive blow in Venezuela. On June 24, 1821, Bolívar's army of about 6,500, including British and Irish volunteers, confronted roughly 5,000 royalists led by Miguel de la Torre near Carabobo. Patriot cavalry under José Antonio Páez routed the Spanish right flank while the center collapsed under coordinated attack. The victory ended major Spanish control over Venezuela and opened the path to the Republic of Gran Colombia. Royalist remnants retreated to coastal strongholds.

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Peru Declares Independence from Spain

After years of colonial rule and amid the broader wave of Latin American independence movements, Argentine general José de San Martín led patriot forces into Lima following the capture of key coastal positions. On July 28, 1821, in the Plaza Mayor, San Martín formally proclaimed Peru's independence from Spanish dominion in a ceremony attended by local leaders and citizens. The declaration asserted that Peru was free by the general will of the people, though full military victory over remaining Spanish forces would not come until 1824 at the Battle of Ayacucho. San Martín assumed the title of Protector of Peru, establishing the foundations for the new republic amid ongoing regional conflicts.

Politics 19th Century North America

Missouri Joins the United States as 24th State

The Louisiana Purchase had opened vast western lands, and Missouri Territory residents petitioned for statehood in 1817. Debates over slavery's expansion led to the Missouri Compromise of 1820, admitting Missouri as a slave state while banning slavery north of the 36°30′ parallel in remaining territories and pairing it with Maine's admission as a free state. After the compromise passed, Missouri drafted a constitution and awaited final approval. On August 10, 1821, President James Monroe proclaimed Missouri the 24th state. The admission balanced sectional interests temporarily but highlighted deepening divisions over slavery that would erupt decades later.

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Treaty of Córdoba Grants Mexican Independence

After eleven years of fighting in the Mexican War of Independence, royalist and insurgent forces reached a political settlement. Agustín de Iturbide, leader of the Army of the Three Guarantees, negotiated with incoming Spanish Viceroy Juan O'Donojú in Córdoba, Veracruz. On August 24, 1821, they signed the Treaty of Córdoba, which recognized Mexico as an independent constitutional monarchy under the Plan of Iguala. The agreement provided for a Mexican empire, religious unity, and social equality among classes. Although Spain later repudiated the treaty, it effectively ended Spanish rule on the ground.

Central America Declares Independence from Spain

By 1821, Spanish colonial rule in the Americas faced widespread challenges from Enlightenment ideas, Napoleonic disruptions in Europe, and successful independence movements in South America. In the Captaincy General of Guatemala, local elites including Creole leaders grew dissatisfied with distant Spanish governance and economic restrictions. On September 15, the Provincial Council in Guatemala City, chaired by Gabino Gaínza, ratified the Act of Independence drafted by José Cecilio del Valle and signed by representatives from the provinces. The document proclaimed separation from Spain while inviting other provinces to a congress to determine the region's future governance structure. News of the declaration spread quickly, leading Costa Rica, El Salvador, Honduras, and Nicaragua to align with the move. The act ended over three...

Mexican Army Enters Mexico City, Securing Independence

After more than a decade of warfare that began with Miguel Hidalgo's 1810 Grito de Dolores, Mexico's independence struggle continued under leaders like José María Morelos and later Vicente Guerrero. In 1821, royalist officer Agustín de Iturbide allied with insurgents under the Plan of Iguala, promising independence, Catholicism, and equality. The Spanish viceroy signed the Treaty of Córdoba in August, recognizing Mexican sovereignty. On September 27, Iturbide's Army of the Three Guarantees triumphantly entered Mexico City. The following day, independence was formally proclaimed, ending Spanish colonial rule after three centuries.