On June 26, 2025, the Pentagon revealed plans to establish two additional military areas on the U.S.-Mexico border. These areas will enable soldiers to temporarily hold migrants attempting unauthorized entry.
These zones build on earlier areas established in April and May 2025. They are part of the Trump administration’s broader effort to curb immigration and reduce border crossings sharply.
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The Texas National Defense Area covers about 250 miles of the Rio Grande near Joint Base San Antonio. The Arizona zone spans over 100 miles near Marine Corps Air Station Yuma.
Approximately 11,900 troops are deployed on the border. Only four detentions in these zones have been reported, and many trespassing charges were dismissed due to legal challenges.
Critics argue that the zones bypass the Posse Comitatus Act by allowing military detention without activating the Insurrection Act, sparking debate about the increasing militarization of immigration enforcement.
