The Rio Grande Valley

The Plan de San Diego and the Rio Grande Valley
With the outbreak of revolution in northern Mexico in 1910, federal authorities and officials of the state of Texas feared that the violence and disorder might spill over into the Rio Grande valley. The Mexican and Mexican-American populations residing in the Valley far outnumbered the Anglo population. Many Valley residents either had relatives living in areas of Mexico affected by revolutionary activity or aided the various revolutionary factions in Mexico. The revolution caused an influx of political refugees and illegal immigrants into the border region, politicizing the Valley population and disturbing the traditional politics of the region. Some radical elements saw the Mexican Revolution as an opportunity to bring about drastic political and economic changes in South Texas. The most extreme example of this was a movement supporting the "Plan of San Diego," a revolutionary manifesto supposedly written and signed at the South Texas town of San Diego on January 6, 1915. The plan, actually drafted in a jail in Monterrey, Nuevo León, provided for the formation of a "Liberating Army of Races and Peoples," to be made up of Mexican Americans, African Americans, and Japanese, to "free" the states of Texas, New Mexico, Arizona, California, and Colorado from United States control. The liberated states would be organized into an independent republic, which might later seek annexation to Mexico. There would be a no-quarter race war, with summary execution of all white males over the age of sixteen. The revolution was to begin on February 20, 1915. Federal and state officials found a copy of the plan when local authorities in McAllen, Texas, arrested Basilio Ramos, Jr., one of the leaders of the plot, on January 24, 1915.

The arrival of February 20 produced only another revolutionary manifesto, rather than the promised insurrection. Similar to the original plan, this second Plan of San Diego emphasized the "liberation"...