All of Mexico Movement

The All of Mexico Movement, or All Mexico Movement, was a political movement to expand the United States to incorporate all of Mexico. It was a controversial aspect of Manifest Destiny that was unable to garner enough political support to encourage adoption. The Mexican-American War (1846-1848) brought the United States and Mexico into conflict over various geopolitical issues, including a desire to invade and annex much of Mexico, that resulted in victory for the United States.

After the US Army took Mexico City, there was renewed enthusiasm for incorporating all of Mexico. There was fierce opposition to the idea within the U.S. Congress on various internal political disputes.