port of Veracruz, the U.S. Army and Marines implemented an intense bombardment of the city from 22–26 March 1847, causing about five hundred civilian deaths and significant damage to homes, buildings, and merchandise. General Winfield Scott and Commodore Matthew C. Perry capitalized on this civilian suffering: by refusing to allow the consulates of Spain and France to assist in civilian evacuation, they pressed Mexican Gen. Juan Morales to negotiate surrender. U.S. commodore Matthew C. Perry, who had already captured the town of Frontera, in Tabasco, tried to seize San Juan Bautista (modern Villahermosa), but he was repelled three times by a Mexican garrison of just under three hundred men. U.S. troops were also sent to the California territories with the intention of seizing it. After squads of U.S. troops occupied the City of Los Angeles, Mexican authorities were forced to move to Sonora; but, by the end of September 1846, commander José María Flores was able to gather 500 Mexicans and managed to defeat the U.S. garrison at Los Angeles and then sent detachments to Santa Barbara and San Diego. After putting up a fierce defense against the U.S. invasion, the Mexican positions along the state of Chihuahua began to fall. These forces had been organized by general José Antonio de Heredia and governor Ángel Trías Álvarez. The cavalry of the latter made several desperate charges against the U.S. that nearly achieved victory, but his inexperience in fighting was evident and, in the end, all the positions gained were lost. French Intervention The French intervention was an invasion by an expeditionary force sent by the Second French Empire, supported in the beginning by the United Kingdom and the Kingdom of Spain. It followed President Benito Juárez's suspension of interest payments to foreign countries on 17 July 1861, which angered Mexico's major creditors: Spain, France and Britain. Napoleon III of France was the instigator: His foreign policy was based on a commitment to free trade. For him, a friendly government in Mexico provided an opportunity to expand free trade by ensuring European access to important markets, and preventing monopoly by the United States. Napoleon also needed the silver that could be mined in Mexico to finance his empire. Napoleon built a coalition with Spain and Britain at a time the U.S. was engaged in a full-scale civil war. The U.S. protested, but could not intervene directly until its civil war was