Battle of Punta Colares
1826 CE.
Shown on the map at -34.567°, -58.000°.
The naval Battle of Punta Colares, also known as the Battle of Corales, was the first major naval engagement of the Cisplatine War. It took place between a fleet of the Empire of Brazil, commanded by admiral Rodrigo José Ferreira Lobo, and a squadron of the United Provinces of the Río de la Plata under the command of admiral William Brown. The confrontations began at around 10 o'clock on 9 February 1826 and lasted for seven hours.
Text from the Wikipedia article Battle of Punta Colares, licensed CC BY-SA 4.0.