 Complete the following phrase:  Patterson was commissioned a major general of volunteers at the outbreak of the MexicanAmerican War and commanded the 2nd Division, Army of Occupation, during the Tampico Expedition. He was considered for command of the expedition to Veracruz which eventually went to Winfield Scott. He was, however, placed in command of the expeditions Volunteer Division and saw action during the Siege of Veracruz and at the 