Battle of Monte Santiago
1827 CE.
Shown on the map at -34.817°, -57.950°.
The Battle of Monte Santiago was fought on 7–8 April 1827, between the Argentine Navy and the Imperial Brazilian Navy, during the Cisplatine War. It was a decisive Brazilian victory, with the allied forces losing its best ships. The battle is highlighted by Argentine historians as one of the most courageous and ferocious naval encounters in the country's history. On that day, Captain Francis Drummond (engaged to Admiral Brown's daughter Elisa) died on deck, firing his marooned ship's cannons instead of retreating. Its result meant a severe setback for the smaller Argentine Navy. From that moment on, only corsair raids against commerce ships could be undertaken by the Argentine Navy and the naval blockade imposed on Buenos Aires by the Brazilian Navy caused serious problems to the export-oriented Argentine economy.
Text from the Wikipedia article Battle of Monte Santiago, licensed CC BY-SA 4.0.