U.S. Marines with Golf Company, 2nd Battalion, 25th Marines, 4th Marine Division, Marine Forces Reserve, fire on range 400 as part of Integrated Training Exercise 4-17 at Camp Wilson, Twentynine Palms, California on June 18, 2017. 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.