Mexico–United States relations

Mexico and the United States have a strained history, with the American invasion in the 1840s and the subsequent American occupation and annexation of more than 50% of former Mexican territory, including Texas, Arizona, California, Nevada, Utah, parts of Colorado, parts of Oklahoma, parts of Kansas and New Mexico. Pressure from American government was one of the factors that helped force the French invaders out in the 1860s.

Source: Wikipedia — Mexico–United States relations (CC BY-SA 4.0)