Lance Cpl. Steven Hartley, a motor transport mechanic with Truck Company, 23rd Marine Regiment, 4th Marine Division, conducts maintenance on a Medium Tactical Vehicle Replacement during Integrated Training Exercise 4-18 in Twentynine Palms, California, on June 8, 2018. ITX is the largest annual Marine Forces Reserve training exercise, bringing together over 5,000 Marines from across the United States to prepare battalion and squadron-sized units for combat, under the most realistic conditions possible. (Photo by U.S. Marine Cpl. Dallas Johnson/released)