An M83 smoke grenade lies in the gravel, after being used by Marines with Golf Company, 2nd Battalion, 25th Marines, 4th Marine Division, Marine Forces Reserve, during range 400 as part of Integrated Training Exercise 4-17 at Camp Wilson, Twentynine Palms, California on June 18, 2017. ITX 4-17 is live-fire and maneuver combined arms exercise designed to train battalion and squadron-sized units in the tactics, techniques, and procedures required to provide a sustainable and ready operational reserve for employment across the full spectrum of crisis and global engagement.