What did the Mexican American War do? The Treaty of Guadalupe Hidalgo (Tratado de Guadalupe Hidalgo signed by President Polk and the Mexican leader Santa Ana.
The war started when the U.S. came to Mexico's land and claimed the Rio Grande. That is when Mexico opened fired on the U.S.
The U.S and Mexican Army were apart of it. They both were fighting for land. Mexico was living in an area where U.S. stands now and U.S. took it from them.
The result of the Mexican - American War was the Treaty of Guadalupe Hidalgo. The treaty added an additional 525,000 square miles to United States territory. In return, the United States paid Mexico $15 million and agreed to settle all claims of U.S. citizens against Mexico.
The Mexican - American War relates to Chicano movements now because people still fight for the rights of Mexicans and it helps their community grow.