 Alarmed by the news of the formation of this new Buenos Aires fleet, it was proposed in Montevideo to attack Buenos Aires before it would become operational, but the speed of its formation thwarted the plan and had to be abandoned.On the revolutionary side, after receiving his commission as commander, lieutenant colonel Brown started his campaign by sailing his small new fleet to Colonia del Sacramento (in today's Uruguay).The patriot forces had a merchant frigate named "Hércules" (350 tons), the corvette "Zephyr", (220 tons),
brigantine "Nancy" (120 tons), schooner "Juliet" (150 tons), schooner "Fortuna" (90 tons), landing boat "San Luis" (15 tons), and sloop "Nuestra Señora del Carmen" (48 tons).