How Did The U.s. Victory In The Mexican War Most Likely Affect The Majority Of Americans?. Army advanced toward mexico city, culminating in one of the war's most decisive battles: Victory in the mexican war strongly reinforced the belief in manifest destiny among americans, encouraging them to view expansion as their divine right.

Army advanced toward mexico city, culminating in one of the war's most decisive battles: The capture of mexico city. Following the successful siege of veracruz, the u.s.