The United States Border Patrol is established on May 28, 1924, as a companion enforcement arm to the Immigration Act signed two days earlier. The new agency is staffed significantly from two personnel pools that carry extensive experience in collective racial punishment: former Texas Rangers who conducted La Matanza along the border, and members or affiliates of the Ku Klux Klan, which is at the peak of its second-era power with an estimated 4-6 million members nationwide in 1924.
Historian Kelly Lytle Hernández documents that the early Border Patrol draws directly from the culture and methods of the Texas Rangers, including the practice of treating entire ethnic Mexican communities as suspect populations. Former Rangers bring not just their skills but their institutional philosophy: enforcement through intimidation, collective punishment of communities, and the racialization of border crossing as an inherently criminal act requiring paramilitary response. The agency also recruits from Klan-affiliated networks, particularly in the Southwest, where the KKK's anti-Mexican and anti-Catholic platforms align with border enforcement ideology.
The founding of the Border Patrol represents a critical institutional transition: the methods of collective racial punishment previously exercised by state militias (Rangers), extralegal organizations (KKK), and local vigilantes are now federalized into a permanent national agency with statutory authority. This transition from informal to formal collective punishment—from night riders to badge-wearing federal officers—gives the practice of targeting entire ethnic communities the legitimacy and permanence of federal law enforcement. The agency's foundational personnel composition means that the DNA of Reconstruction-era racial terrorism and Texas border massacre culture is encoded into the institutional origin of American border enforcement. This lineage runs unbroken through Harlon Carter's rise within the agency, Operation Wetback in 1954, and the modern deployment of BORTAC tactical units.