The new military zone is located in Cameron and Hidalgo Counties in Texas and will be transferred from land overseen by the International Boundary and Water Commission, an entity that settles treaty issues between the U.

U.S. military personnel operating in the buffer zones do not carry out law enforcement duties, but can temporarily detain any trespassers, as they would at any military base, unti

The Defense Department is expanding its border role with a new military zone near Yuma, aiming to boost surveillance as crossings continue to fall.