Texas Gov. Greg Abbott deployed the troops to the Rio Grande Valley, where he said they'll work side-by-side with U.S. Border Patrol agents to keep migrants from illegally entering the country. Some of those troops left from the U.S. Naval Air Station Joint Reserve Base in Fort Worth Monday morning. The others left from a base in Houston.

It's part of the deal between Mexico and the U.S. to delay new tariffs for a month. Mexico said the officers will combat drug trafficking and control migration.