Lance Cpl. Alfredo Mercedes, left, and Lance Cpl. Tim Teague, right, mortarmen with Weapons Company, 3rd Battalion, 25th Marine Regiment, 4th Marine Division, employ an 81mm mortar system while executing remedial exercises during Integrated Training Exercise 4-19 at Camp Wilson aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., June 5, 2019. ITX 4-19 is an essential component of the MARFORRES training and readiness cycle. It serves as the principal exercise for assessing a unit’s capabilities. (U.S. Marine Corps photo by Lance Cpl. Preston L. Morris)