U.S. Marines with India Company, 3rd Battalion, 25th Marine Regiment, 4th Marine Division engage the enemy in a platoon attack on Range 410, an overhead fire infantry company training range, during Integrated Training Exercise 4-19 at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., June 9, 2019. ITX 4-19 is an essential component of the Marine Forces Reserve training cycle. It serves as the principal exercise for assessing a unit’s readiness. (U.S. Marine Corps photo by Cpl. Tessa D. Watts)