The battle of Cerro Gordo occurred during the Mexican War in a mountain pass commanding General Taylor's line of march from Vera Cruz toward the city of Mexico. It was occupied and fortified by the Mexican leader, Santa Anna, and a battle took place there on April the 17th and 18th 1847. Taylor first succeeded in occupying the Ataloga heights which overlooked Santa Anna's position and which he had, contrary to the advice of his generals, left unguarded, as impossible of access to the Americans. This step of Taylor's practically won the day. Actual fighting began early on April the 18th. The guns on the Ataloga heights opened fire upon Santa Anna's fortifications on Cerro Gordo, while General Twiggs and ColonelBaker attacked the Mexicans' unprotected rear. This resulted in defeat for the Mexicans. Santa Anna fled. Number engaged: Americans, 8500; Mexicans, 12,000. Research Battle of Cerro Gordo