William Brown's blockade of Montevideo and the Battle of Buceo

Background. William Brown, an Irish sailor serving in the Argentine Navy, had earlier been commissioned as a lieutenant-colonel at the service of the navy and appointed Commander-in-Chief of the Argentine fleet. By the time of this campaign, Brown's naval forces had been increased by the addition of three armed merchant vessels, and the Spanish blockading squadron was itself blockaded by Brown and his fleet. On 14 May, Brown pretended to retreat, drawing Spanish forces away from the protection of fort guns, setting the stage for the engagement at Buceo.

The Engagement. The Battle of Buceo occurred between an Argentine fleet under Brown and a Spanish fleet under Admiral Sierra off the coast of Montevideo. During the engagement, Brown's leg was shattered by a cannonball. The battle concluded on 17 May with the destruction of five Spanish ships by fire and the capture of two others, marking a decisive naval victory for the Argentine forces.

Outcome. The naval victory at Buceo had immediate strategic consequences. As a direct result of the battle, the Río de la Plata was freed from Spanish control. Consequently, Montevideo fell to the Argentines, ending the Spanish colonial presence in the area during this phase of the conflict.