The Mexican Farm Labor Agreement of 1942
In 1942, the United States passed the Mexican Farm Labor Agreement or the Bracero Program in response to the influx of American men joining the World War II efforts. In conjunction with agribusiness and the Mexican government, the U.S. created a worker program permitting millions of Mexican farm workers to enter legally. Lasting from 1942 to 1964, the program exponentially increased the quantity of Mexican farm laborers in the United States and shaped the labor dependence which lasts into today. During this time, farmers were grateful to hire undocumented laborers at lower wages than American workers.
-Sand and Blood: America's Stealth War on the Mexico Border by John Carlos Frey