Rubuta ci gaba don wannan sakin layi - A cewar marubucin tarihin John Eisenhower, mamayar Mexico ta hanyar Veracruz ita ce "har zuwa wannan lokacin mafi girman burin da aka yi a tarihin ɗan adam". An fara aikin ne a ranar 9 ga Maris, 1847 tare da Siege na Veracruz
, wani hadin gwiwar rundunar soji da na sojan ruwa karkashin jagorancin Scott da Commodore David Conner. Bayan da ya sauko da rundunarsa ta mutum 12,000, Scott ya kewaye Veracruz kuma ya fara harbi da shi; sojojin Mexico sun mika wuya a ranar 27 ga Maris. Da yake yana son ya guji tayar da zaune tsaye a kan mamayewar Amirka, Scott ya sa ya zama abu na farko da ya fi muhimmanci a gare shi ya sami haɗin kai daga Cocin Katolika. A cikin wasu abubuwa da ya yi don ya nuna daraja ga dukiyar cocin da kuma ma'aikatanta, ya umurci mutanensa su gai da firistocin Katolika a kan titunan Veracruz. Bayan tabbatar da kayayyaki da motoci, sojojin Scott sun fara tafiya zuwa Xalapa, wani birni a kan hanyar zuwa Mexico City. A halin yanzu, Polk ya aika da Nicholas Trist, Sakataren Gwamnati James Buchanan babban sakatare, don yin shawarwari game da yarjejeniyar zaman lafiya tare da shugabannin Mexico. Ko da yake da farko ba su jitu ba, daga baya Scott da Trist suka zama abokai na kud da kud.