Juan Manuel de Rosas
![Posthumous portrait of Juan Manuel de Rosas wearing the full dress of a brigadier general](https://upload.wikimedia.org/wikipedia/commons/3/36/Juan_Manuel_de_Rosas_by_Norris.jpg)
In December 1829, Rosas became governor of the province of Buenos Aires and established a dictatorship backed by state terrorism. In 1831, he signed the Federal Pact, recognising provincial autonomy and creating the Argentine Confederation. When his term of office ended in 1832, Rosas departed to the frontier to wage war on the indigenous peoples. After his supporters launched a ''coup'' in Buenos Aires, Rosas was asked to return and once again took office as governor. Rosas reestablished his dictatorship and formed the repressive ''Mazorca'', an armed parapolice that killed thousands of citizens. Elections became a farce, and the legislature and judiciary became docile instruments of his will. Rosas created a cult of personality and his regime became totalitarian in nature, with all aspects of society rigidly controlled.
Rosas faced many threats to his power during the late 1830s and early 1840s. He fought a war against the Peru–Bolivian Confederation, endured a blockade by France, faced a revolt in his own province and battled a major rebellion that lasted for years and spread to five northern Argentine provinces. Rosas persevered and extended his influence in the provinces, exercising effective control over them through direct and indirect means. By 1848, he had extended his power beyond the borders of Buenos Aires and was ruler of all of Argentina. Rosas also attempted to annex the neighbouring nations of Uruguay and Paraguay. France and Great Britain jointly retaliated against Argentine expansionism, blockading Buenos Aires for most of the late 1840s, but were unable to halt Rosas, whose prestige was greatly enhanced by his string of successes.
When the Empire of Brazil began aiding Uruguay in its struggle against Argentina, Rosas declared war in August 1851, starting the Platine War. This short conflict ended with Rosas being defeated and absconding to Britain. His last years were spent in exile living as a tenant farmer until his death in 1877. Rosas garnered an enduring public perception among Argentines as a brutal tyrant. Since the 1930s, an authoritarian, anti-Semitic, and racist political movement in Argentina called Revisionism tried to improve Rosas's reputation and establish a new dictatorship in the model of his regime. In 1989, his remains were repatriated by the government in an attempt to promote national unity, seeking to rehabilitate Rosas and pardon military personnel convicted of human rights abuses. Rosas remains a controversial figure in Argentina in the 21st century; he is represented on the 20 Argentine peso bill. Provided by Wikipedia