Corporal Jonathan W. Corwin, a Field Artillery Cannoneer, with Mike Battery, 3rd Battalion, 14th Marine Regiment, 4th Marine Division, commands the Howitzer during a direct fire shoot at Integrated Training Exercise 4-18 in Twentynine Palms, California, June 13, 2018. ITX 4-18 is a live-fire and maneuver combined arms exercise designed to train battalion and squadron-sized units in tactics, techniques, and procedures required to provide a sustainable and ready operational reserve for employment across the full spectrum of crisis and global engagement.