From the Halls of Montezuma →

"As thefts, assaults, rapes, murders, and other crimes perpetrated by the volunteers mounted... ordinary Mexican citizens began to have serious reservations about the American invasion. ...particularly pro-expansionists such as Secretary of the Treasury Robert J. Walker, believed that Mexicans would welcome the Americans as liberators. Instead, public opinion turned against the Americans and began to create a climate for guerrilla bands to form in the area."

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