Hérard sent three columns of Haitian troops, each numbering 10,000 men, to reestablish his authority. In the south, Santana defeated Hérard at the Battle of Azua on March 19. Dominican forces suffered no casualties in the battle, while the Haitians sustained over 1,000 killed. In the north, Dominican General José María Imbert defeated the Haitian column led by Jean-Louis Pierrot at the Battle of Santiago on March 30. Over 600 Haitians were killed while the Dominicans suffered no casualties. Events at sea also went poorly for the Haitians. Three Dominican schooners under the command of Juan Bautista Cambiaso intercepted a Haitian brigantine and two schooners which were bombarding shore targets. In the ensuing engagement, all three Haitian vessels were sunk, ensuring Dominican naval superiority for the rest of the war. On August 6, 1845, the new Haitian president, Luis Pierrot, launched a new invasion. On September 17, Dominican General José Joaquín Puello defeated the Haitian vanguard near the frontier at Estrelleta where the Dominican square, with bayonets, repulsed a Haitian cavalry charge. The Dominicans suffered no deaths during the battle and only three wounded. On November 27, 1845, Dominican General Francisco Antonio Salcedo defeated the Haitian army at the Battle of Beler. Salcedo was supported by Admiral Juan Bautista Cambiaso's squadron of three schooners, which blockaded the Haitian port of Cap-Haïtien. Haitian losses were 350 killed and 10 captured; the Dominicans lost 16 killed.