Independence Won: Latin America, the Monroe Doctrine, and the Price of Freedom (History HL)

Latin America's independence wars (roughly 1810–1826) were not one single uprising. They were a patchwork of separate campaigns across a huge continent, led mainly by two men: Simón Bolívar in the north and José de San Martín in the south. Comparing them shows both the shared causes of independence and why each country's path looked different.

Simón Bolívar and the northern campaigns (Gran Colombia)

Bolívar was a wealthy Venezuelan Creole deeply influenced by Enlightenment ideas of liberty and self-government. After early defeats, he issued the Cartagena Manifesto (1812), arguing that disunity among patriots was the reason Venezuela's first republic had collapsed. He returned in 1813 launching an "Admirable Campaign", declaring "war to the death" against Spanish loyalists.

Bolívar's decisive move was a surprise crossing of the flooded Andes plains and the freezing mountain passes into New Granada (Colombia) in 1819 — a route the Spanish thought impossible in the rainy season. His army, weakened by cold and hunger, still won the Battle of Boyacá (7 August 1819), which effectively liberated New Granada. This victory let him found Gran Colombia, uniting Venezuela, New Granada and Ecuador.

Why the Andes crossing mattered: It was a military gamble that worked because it achieved total surprise. Examiners reward candidates who can explain why a battle mattered, not just describe it: Boyacá mattered because it opened the road to Bogotá and let Bolívar consolidate a new state, not just because patriots won.

Bolívar went on to defeat royalist forces at Carabobo (1821), securing Venezuela, and later helped liberate Ecuador after the Battle of Pichincha (1822). At the famous Guayaquil Conference (1822), Bolívar met San Martín — but San Martín withdrew from the struggle afterward, leaving Bolívar (and his general Antonio José de Sucre) to finish the job in Peru and Upper Peru, defeating the last major Spanish army at Ayacucho (1824). Upper Peru was renamed Bolivia in his honour.

José de San Martín and the southern campaigns (Río de la Plata)

San Martín, an Argentine-born officer trained in the Spanish army, took a more cautious, methodical approach than Bolívar. After Buenos Aires (Argentina) had already broken from Spanish control in 1810, San Martín built and trained the Army of the Andes in Mendoza for over a year before acting.

In January 1817 he led roughly 5,000 soldiers across the Andes into Chile — a logistical feat as extraordinary as Bolívar's, involving multiple mountain passes at once to confuse the Spanish. He defeated royalist forces at the Battle of Chacabuco (1817), helping Bernardo O'Higgins secure Chilean independence, confirmed at Maipú (1818).

San Martín then sailed north by sea to attack the royalist stronghold of Peru, entering Lima in 1821 and proclaiming Peruvian independence. But loyalist forces still held the Peruvian highlands. Unwilling to escalate the fight further himself, San Martín met Bolívar at Guayaquil in 1822, then quietly resigned his command and left for exile in Europe — leaving Bolívar and Sucre to finish liberating Peru at Ayacucho in 1824.

Comparing two leaders: A classic Paper 3 essay asks you to compare the contributions of two leaders. Structure it by theme (military strategy, political vision, use of foreign help) rather than telling two separate life stories side by side — that keeps the comparison explicit throughout.

The guide asks you to be able to explain similarities and differences in the independence processes of two Latin American countries. Argentina (part of the former Viceroyalty of Río de la Plata) and Brazil make a strong, examinable contrast because one broke from its empire through revolution and war, while the other separated almost peacefully.

Argentina: revolution from below

The May Revolution (1810) in Buenos Aires removed the Spanish viceroy after Napoleon's invasion of Spain left the monarchy in crisis — colonial elites did not trust the puppet government Napoleon had installed and preferred to rule themselves. A formal declaration of independence followed at the Congress of Tucumán (1816). Argentina's break was contested, involved years of factional conflict between centralists and federalists, and needed San Martín's military campaigns to secure neighbouring Chile and Peru before the wider region was safe from royalist counter-attack.

Brazil: independence from above

Brazil's path could not have been more different. When Napoleon invaded Portugal in 1807, the entire Portuguese royal court fled to Rio de Janeiro — meaning Brazil briefly became the seat of the empire itself, not just a colony. When King João VI returned to Portugal in 1821, he left his son Dom Pedro behind as regent.

Facing Portuguese demands to reduce Brazil back to colonial status, Pedro sided with Brazilian elites. In September 1822 he declared independence with the "Cry of Ipiranga" ("Independence or death!") and became Emperor Pedro I of a new, independent Brazilian monarchy — not a republic. There was little large-scale warfare; the transition was negotiated far more than fought.

Why the difference?: The key causal factor is what happened to the parent monarchy. Spain's king was deposed and Spanish America had no royal figure to rally around, so republics and warfare followed. Portugal's king simply relocated to Brazil, so when his son led the split there was already a monarch on Brazilian soil — no revolution was needed to create new authority.

Both cases still share deep causes common to the whole continent: Enlightenment ideas of self-rule, resentment of trade restrictions imposed by the parent empire, and the fact that Napoleon's invasion of Iberia in 1807–1808 removed effective royal control from both Spanish and Portuguese America at the same time.

Same trigger, different outcome: Napoleon's invasion of Spain and Portugal is the single event that unlocks BOTH stories — it created a power vacuum in Spanish America (leading to revolution) and physically moved the Portuguese crown to Brazil (leading to a negotiated split). One cause, two very different results.

As Spain's American empire collapsed in the 1820s, the United States had to decide how to respond — both to protect the new republics and to protect its own growing interests.

The Monroe Doctrine (1823)

President James Monroe, in his December 1823 message to Congress, declared that the Americas were no longer open to further European colonization, and that any European attempt to interfere with or recolonize the newly independent states would be viewed as a hostile act against the United States. In exchange, the US promised not to interfere in existing European colonies or in European affairs.

Don't overstate 1823: It's tempting to write that the Monroe Doctrine "protected" Latin America. In 1823 it was mostly a statement of principle, not enforced US power — examiners reward candidates who note this nuance rather than assuming instant US dominance.

Economic impact of the wars of independence

Independence was expensive and disruptive. Years of fighting destroyed mines, plantations and infrastructure across Spanish America; silver production in Mexico and Peru — once the backbone of the colonial economy — collapsed and took decades to recover. New nations inherited large war debts and had to build tax systems and currencies almost from nothing.

Old mercantilist trade rules that tied colonies to Spain and Portugal were swept away. New nations opened their ports to international trade — especially with Britain, which rapidly became Latin America's main trading partner and lender, filling the gap left by Spain and Portugal.

Social impact: who won, who didn't

Two economies and societies, compared: For the "impact on two economies and societies" bullet, a strong pairing is Gran Colombia (Creole-led republic, gradual slave emancipation, indigenous land loss) versus Brazil (monarchy, slavery continued for another six decades, only slightly different economic disruption because independence was largely peaceful).