Those areas include the Roosevelt Reservation — a narrow strip of land along the southwest border in the states of Arizona, New Mexico and California — but exclude federal Indian reservations.

The order would empower troops to detain people attempting to illegally enter the U.S. within the stretch of land, which was established by President Theodore Roosevelt for border security in 1907. Trump authorized the military to operate in the same area during his first administration to aid construction of a wall to deter migrant crossings.

President Donald Trump issued a memorandum Friday giving the U.S. military jurisdiction over federal lands at the southern border.