Perhaps no other industrial technology changed the course of Mexican history in the United States-and Mexico-than did the coming of the railroads. Tens of thousands of Mexicans worked for the railroads in the United States, especially in the Southwest and Midwest. Extensive Mexican American settlements appeared throughout the lower and upper Midwest as the result of the railroad. Only agricultural work surpassed railroad work in terms of employment of Mexicans. In Traqueros, Jeffrey Marcos Garcilazo mined numerous archives and other sources to provide the first and only comprehensive history...