Militia
Argentina

In the early 1800s Buenos Aires, which was by then the capital of the Viceroyalty of the Río de la Plata, was attacked during the British invasions of the Río de la Plata. As regular military forces were insufficient to counter the British attackers, Santiago de Liniers drafted all males in the city capable of bearing arms into the military. These recruits included the criollo peoples, who ranked low down in the social hierarchy, as well as some slaves. With these reinforcements, the British armies were twice defeated. The militias became a strong factor in the politics of the city afterwards, as a springboard from which the criollos could manifest their political ambitions. They were a key element in the success of the May Revolution, which deposed the Spanish viceroy and began the Argentine War of Independence. A decree by Mariano Moreno derogated the system of promotions involving criollos, allowing instead their promotion on military merit.

The Argentine Civil War was waged by militias again, as both federalists and unitarians drafted common people into their ranks as part of ongoing conflicts. These irregular armies were organized at a provincial level, and assembled as leagues depending on political pacts. This system had declined by the 1870s, mainly due to the establishment of the modern Argentine Army, drafted for the Paraguayan War by President Bartolomé Mitre. Provincial militias were outlawed and decimated by the new army throughout the presidential terms of Mitre, Sarmiento, Avellaneda and Roca.
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