What was the capital of the union of provinces in the Río de la Plata comprised by most of the former dependencies from the last to be organized and also the shortest-lived of the Viceroyalties of the Spanish Empire in the Americas?
Viceroyalty of the Río de la Plata The Viceroyalty of the Río de la Plata (Spanish: "Virreinato del Río de la Plata" ) was the last to be organized and also the shortest-lived of the Viceroyalties of the Spanish Empire in the Americas.
Captaincy General of Puerto Rico The Captaincy General of Puerto Rico (Spanish: "Capitanía General de Puerto Rico" ) was an administrative district of the Spanish Empire, created in 1580 to provide better military management of the island of Puerto Rico, previously under the direct rule of a simple governor and the jurisdiction of Audiencia of Santo Domingo. Its creation was part of the, ultimately futile, Habsburg attempt in the late 16th century to prevent incursion into the Caribbean by foreign powers. Spain also established Captaincies General in Cuba, Guatemala and Yucatán.