The Blockade of Veracruz was a conflict during the Mexican–American War. The blockade of Veracruz was extremely important in the Mexican-American War in stopping the trade of contraband.^[1]: 107

Secretary of the Navy George Bancroft instructed Commodore David Conner's Home Squadron to "exercise all the rights that belong to you as commander-in-chief of a belligerent squadron."^[1]: 108 On 14 May 1846, Conner proclaimed Veracruz, Alvarado, Tampico and Matamoros under blockade.^[1]: 109 Conner sent the sloop-of-war St. Mary's to Tampico, the paddle frigate Mississippi to Veracruz, and the sloop-of-war Falmouth to Alvarado.^[1]: 109