In 1846 during the Mexican-American war, Mazatlán was invaded and occupied by the U.S. military as part of the U.S. Pacific Coast campaign. In 1859, the port was blockaded by Captain Sidney Grenfell of the British steamship H.M.S. Amethyst. On November 13, 1864, the French Army and the Imperialist forces took possession of Mazatlán, until they were deported on November 13, 1866 by General Ramón Corona's forces. After customs officials seized twenty-three ounces of gold from the British warship "Chanticleer" on June 18, 1868, which at the time was blockading the port, its captain, William H. Bridge, threatened to bomb the city on November 22.