The main justification for the war against Mexico comes from "Manifest Destiny", the belife that God wanted the United States to expand from one ocean to the other, to spread democracy, freedom and western values across the continent. It was a sense of "mission" that the American settlers had in the middle of the XIX century.
In examining a “symbolic” event such as the Revolution, however, we often overlook how our whole conceptualization of the boundaries of that “extended” event is largely based upon a sense of comparison.
