Rio de La Plata, Viceroyalty (British Louisiana)

Río de La Plata was the fourth of the four viceroyalies that Spain had created in the New World.

Established in 1776, uniting the Hearings of Buenos Aires and Charcas, from. En 1803, Charcas was handed back to Perú.

The Viceroyalty lasted till 1932, when the Spanish crown granted independence as the new Federation of Rio de La Plata, under the Spanish Commonwealth