Envelopment Once ashore Patterson's division began marching northward to effect a complete envelopment of the city. On March 24,
Persifor F. Smith's brigade captured a Mexican soldier with reports that
Antonio López de Santa Anna was marching an army from
Mexico City to the relief of Veracruz. Scott dispatched Colonel
William S. Harney with 100
dragoons to inspect any approaches that Santa Anna might make. Harney reported about 2,000 Mexicans and a battery not far away, and he called for reinforcements. General Patterson led a mixed group of volunteers and dragoons to Harney's aid and cleared the force from their positions, chasing them to
Medellin.
Surrender Scott made plans for an assault on the city when on 25 March, the Mexicans called for a cease-fire to evacuate women and children which Scott refused. That night, Morales'
council of war advised surrender prompting Morales to resign while General José Juan Landero assumed command. A truce was called at 8 am on 26 March while terms of surrender were negotiated and concluded by 27 March. On 29 March, the Mexicans officially surrendered their garrisons in Veracruz and Fort Ulúa and later that day, the
U.S. flag flew over San Juan de Ulúa. ==Aftermath==