Battle of Monte Santiago

Background. The engagement took place during the Cisplatine War between Argentina and Brazil. The Brazilian Navy possessed high seas vessels with greater firepower but less speed, while the Argentine Navy relied on fast maneuvering ships. Argentine commanders believed that shallow waters and their speed could favor them in engagements, hoping to inflict damage and escape before a Brazilian counterattack.

Engagement. At two o'clock in the morning, the Brazilians opened fire, attempting to trap the pursued Argentine ships between the line of Imperial brigs and the coast. The battle is highlighted by Argentine historians as one of the most courageous and ferocious naval encounters in the country's history, resulting in the destruction of two of Argentina's precious brigs-of-war.

Consequences. The battle was a decisive Brazilian victory, with the allied forces losing its best ships. The losses, combined with the earlier loss of the vessel 25 de Mayo, kept the Brazilian Navy in control of the River Plate. Consequently, the Argentine Navy could only undertake corsair raids against commerce ships, as the blockade imposed on Buenos Aires caused serious problems to the export-oriented Argentine economy.