It’s part of a major shift, under Donald Trump's presidency, that has thrust the military into border enforcement with Mexico like never before.

The Pentagon is establishing a fourth military defense zone along the U.S.-Mexico border, where American soldiers can apprehend noncitizens on charges of trespassing, Chief Pentagon spokesman Sean Parnell said Wednesday.

Annexed militarized zones on public land will soon cover nearly one-third of the U.S. border with Mexico, empowering soldiers to arrest people who cross the border illegally and facilitating new crimi