The First Treaty of San Ildefonso, 1 October 1777, fixed borders between the colonial possessions in South Americaheld by Spain and Portugal, primarily in the Río de la Plata region.
Colonia del Sacramento; the wharf built by Spain in 1860 [citation needed]
Pedro de Cevallos, Viceroy of Río de la Plata
The Viceroyalty of the Río de la Plata or Viceroyalty of the River Plate was the last to be organised and also the shortest-lived viceroyalty of the Spanish Empire in the Americas. It was established
William Beresford surrendering to Santiago de Liniers during the British Invasions to the Río de la Plata.
Picture of Pedro Domingo Murillo, main leader of the La Paz Revolution.
Portrait of José de Gálvez