 Brown's victory divided the enemy's forces, and secured the United Provinces' control of access to the interior waterways, and made possible their advance on Montevideo.After the decisive victory at the Buceo engagement, they could also blockade the city to the open sea completing the land blockade by the army, causing the city's surrender.On 25 May 1810 the May Revolution in Buenos Aires deposed viceroy Baltasar Hidalgo de Cisneros and established a local government known as the Primera Junta.