Pedro Antonio Olañeta

Pedro Antonio de Olañeta y Marquiegui was a Royalist commander in the army of the Spanish Empire who fought against the South American insurgency led by Simón Bolívar. His support for Spanish absolutism and rebellion against the moderate Royalists created conflicts within the Royalist army that aided the rebels. After the defeat of the main Royalist armies, he continued the resistance, becoming one of the last Royalist commanders to hold out. Olañeta was the last Viceroy of the Río de la Plata.