1913 El Paso smelters' strike
The 1913 El Paso smelters' strike was a labor strike involving workers of the American Smelting and Refining Company's copper smelting plant in El Paso, Texas, United States. The workers, almost entirely Mexican Americans, went on strike on April 10, primarily seeking a pay increase, among other demands.
Source: Wikipedia — 1913 El Paso smelters' strike (CC BY-SA 4.0)