Argentine Revolution

The Argentine Revolution, usually dated from 1810 to 1824, was the political and military upheaval that ended Spanish colonial rule in the Río de la Plata region and set Argentina on the path to nationhood. It began in Buenos Aires with the removal of the Spanish viceroy and grew into a continental struggle. Its leaders helped to defeat royalist power across much of South America, and it left a legacy of unresolved arguments about how the new country should be governed.

The background lay in both long-term change and sudden crisis. In 1776 Spain had created the Viceroyalty of the Río de la Plata, with Buenos Aires as its capital, and the port grew rich on trade. Local merchants and the American-born elite, known as criollos, resented commercial restrictions and their limited access to high office. British invasions of Buenos Aires in 1806 and 1807 were repelled largely by locally raised militias, which gave the city's residents confidence in their own strength and weakened the viceroy's authority. The decisive shock came in 1808, when Napoleon forced the Spanish king from his throne and Spain's legitimate government collapsed into confusion.

In May 1810, as news arrived that the main Spanish resistance authority in Seville had been all but overwhelmed by French forces, criollo leaders in Buenos Aires pressed for change. An open town meeting, the cabildo abierto, voted to remove Viceroy Baltasar Hidalgo de Cisneros, and a local governing council, the Primera Junta, took power on 25 May. At first it claimed to rule in the name of the imprisoned King Ferdinand VII, a common stance across Spanish America at the time. Historians still debate how far the leaders sought full independence from the start and how far this loyalty was a pragmatic cover.

The following years were turbulent. Buenos Aires sent armies north and across the Andes, but its authority was rejected by Paraguay and by the Banda Oriental (modern Uruguay), and conflicts grew between centralizing leaders in the capital and provincial leaders favoring autonomy. Independence was formally declared at the Congress of Tucumán in July 1816. José de San Martín then organized the Army of the Andes, crossed the mountains in 1817, and helped win Chilean independence before campaigning in Peru. Other forces fought in the north. Spanish power in South America was finally broken at Ayacucho in 1824, which is why that year often closes the period.

The consequences were mixed. Independence was achieved, but Argentina did not immediately become a unified state. For decades the provinces and Buenos Aires clashed over federalism, trade revenue and leadership, and a stable national constitution did not come until 1853. The revolution nonetheless established the central national myths of Argentina, and 25 May remains a national holiday. It also showed how the crisis in Spain could open the way for independence movements across the Americas.