What was the role of imperialism in the Mexican revolution?

A majority of Mexican Imperialism on the United States' part was during the Mexican-American War from 1846-1848. The result of Mexico's loss in the war caused them to lose more than 500,000 square miles of land, which is 55% of its national territory. This caused people to relocate back into Mexico, or caused the people inhabiting Texas during the time to appeal for American citizenships.

The war was unnecessary and unjust on the United States part. They were drove purely by the idea of Manifest Destiny. Even President Grant "to this day regards the war as one of the most unjust ever waged by a stronger against a weaker nation."

Also as a result of the war Mexico lost around 13,000 soldiers compared to the 2,000 Americans killed. Mexico also faced the destruction of much of their land, and poverty as a result of the destruction and relocation efforts made by Texans.