The United States Defense Department has announced the establishment of a new Zona of national defense along the south-western border with Mexico, called “national defense area“, To counter illegal immigration.
A stretch of 250 miles along the Grande Rio, in the Texan counties of Cameron and Hidalgo, was designated as an extension of the Joint Base San Antonio Dalla US Air Force. . The management of this area, previously under the International Boundary and Water Commission, It now passes under military control.
This move is part of President Donald Trump’s strategy, outlined in a April Memorandum, which aims to strengthen safety on the southern border through the use of military resources. The designation of national defense areas allows the military to support the installation of barriers, make patrols and temporarily retain transgressors, then transferring them to the competent authorities. Although the US army cannot perform civil police functions, these areas confer a limited authority for specific safety operations.
Expansion of defense areas
The new area in Texas is added to two areas already established: one of 170 miles in New Mexico, connected to Fort Huachuca in Arizona, and another of 63 miles in Western Texas, under Fort Bliss. Overall, the national defense areas now cover further 480 miles of the Texas-Messic border, which extends for 1,254 miles. The Department of Defense and the Navy have not yet confirmed further expansions.
Marines directed towards the border with Mexico Department of Defense
Legal challenges
Despite the aim of strengthening control, the application of the new measures has encountered legal obstacles. In May, a federal judge filed the accusations of violation of military property against 98 migrants arrested in the defense area of the new Mexico. Judge Gregory Wormuth has established that the government was unable to demonstrate that migrants were aware of entering a restricted military area, despite the presence of bilingual signs. The area, which extends over mountainous and difficult soils, makes it complex to ensure that the signals are visible. However, the accusations of illegal crossing of the border remain standing.
In a separate case in Western Texas, at least 60 people admitted that they had consciously made a violation in a national defense area, according to the Department of Justice.
Economic and political implications
The establishment of these areas reflects a more decisive approach to the management of immigration, with significant economic implications. The strengthening of border infrastructures and the use of military resources involve high costs, but could reduce the expenses associated with the management of long -term illegal immigration. However, judicial decisions, such as the one in New Mexico, highlight the complexity of balanced security and respect for legal rights.
This strategy Phe would have influenced relations with Mexicoabove all considering the role of the Internazional Boundary and Water Commission in the management of shared water resources. In addition, the militarized approach could feed internal political debates, with divergent opinions on the effectiveness and ethics of these measures.


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