*Millions of people in the United States today identify themselves as Mexican immigrants or Mexican Americans. *The first Mexicans to become part of the United States never crossed any border. Instead, the border crossed them. *Beginning in the 1820s immigrants from the U.S. and Europe settled Texas (Tejas), then part of Mexico *Hispanic Americans made up a significant number of workers in a number of industries, *The employment needs of the railroad industry in the late nineteenth century brought Mexican immigrants from more remote regions of Mexico, while the new systems integrated the border regions of the United States and Mexico. The railroad also led to the economic development of those parts of the US, drawing Mexican immigrants in large numbers into agriculture in the early twentieth century, establishing a pattern that continued thereafter *It is already public domain that with the motive of the North-American invasion and the Treaty of Guadalupe in 1846-47, 45 percent of Mexico's original territory is taken away. Between 1900 and 1930 more than 1,000,000 Mexicans came into the United States from Mexico. During these two decades, Mexicans made up the greatest number of new immigrants to the United States. Between 1900 and 1990, approximately 2,500,000 Mexican citizens both with documents and many undocumented immigrated into the United States (Meier, 1972, p. 118). In the year 2000, according to the U.S. Census, 281,421,906 people of Mexican descent reside in the United States. Between 1900 and 1930 approximately 45,000 Mexican individuals came to Colorado. Recruited by immigration agencies, most of them came as immigrant laborers from Eagle Pass, Texas, lured to the area by higher wages. Others traveled north from New Mexico and many came as illegal aliens or "undocumented" immigrants. They found work mainly in the sugar beet fields in the South Platte and Arkansas River Valleys.
The history of immigration law in the United States provides an...