Explain three events that effected american relations with mexico in the early 1900s

The dispute surrounding assigning the border at the Río Grande or at Nueces River, coupled with the U.S. annexation of Texas in 1845, set the Mexican-American War into motion. This slice of land between the Río Grande and the Nueces River is called the Trans-Nueces, which you can see in the middle of the two yellow lines in the center of the map on the left. Lasting from 1846-1848, the Mexican-American War ended in the Mexico-U.S. border being set at the Rio Grande and the signing of the Treaty of Guadalupe Hidalgo. As part of the Treaty, Mexico lost a devastating 55% of its land to the U.S., giving both countries the border we recognize today. Well, for the most part.

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