U.S.-Mexico border region is inhabited by many Native American groups who have lived in the area for centuries.
Spain establishes colonial government in Mexico.
Adam-Onis Treaty: U.S.-Mexico boundary established by Spain and the United States.
Mexico wins independence from Spain.
Mexico becomes a republic.|
The U.S. Mexico war begins.
Gold is discovered at Sutter’s Mill in the Sacramento Valley area of California. By 1849, large numbers of U.S. pioneers and immigrants from around the world travel to the mining area. Many gold seekers set up camps on Mexican-held land, forcing out some of the original landowners.
The Treaty of Guadalupe Hidalgo brings the U.S.-Mexican War to an end.
Chinese labor is reduced because of the Chinese Exclusion Act, and railroad companies search for alternative sources of cheap labor. Mexican workers are increasingly recruited.
Increasingly, Mexican Americans work for the railroads. Railroad construction continues throughout the early 20th century.
Copper mining continues to lure people to Arizona, driving more Mexican Americans from their lands.
Copper, silver, and zinc are found in Arizona and New Mexico; Texas begins to mine salt, leading to further expulsion of Mexican American land owners.
The first border patrol is established to stop Asian workers from coming into the United States through Mexico. 1910
Mexican Revolution begins. Thousands of Mexicans flee across the border for safety.
The Immigration Act of 1921 restricts the immigration of Southern and Eastern Europeans. Agriculture lobbyists rally to block the movement to include Mexicans in the proposition.
Largely due to a lack of immigration quotas, more than 89,000 Mexicans come into the United States on permanent visas, making 1924 the peak year for Mexican immigration.
Immigration Act of 1924 halts the...