Juan Manuel de Rosas (30 March 1793 – 14 March 1877), nicknamed "Restorer of the Laws", was a politician and army officer who ruled Buenos Aires Province and briefly the Argentine Confederation. Although born into a wealthy family, Rosas independently amassed a personal fortune, acquiring large grants of land in the process. Rosas enlisted his workers in a private militia, as was common for rural proprietors, and took part in the factious disputes that had led to numerous civil wars in his country. Victorious in warfare, personally influential, and with vast landholdings and a loyal private army, Rosas became the quintessential caudillo, as provincial warlords in the region were known. He eventually reached the rank of brigadier general, the highest in the Argentine army, and became the undisputed leader of the Federalist Party.