Marines with Weapons Company, 3rd Battalion, 25th Marines, 4th Marine Division, prepare to mount machine guns at range 400 during Integrated Training Exercise (ITX) 4-21 at Marine Corps Air Ground Combat Center Twentynine Palms, California on July 25, 2021. Range 400 is a company-sized live-fire assault range that requires complex coordination of fires, producing combat-ready Reserve Marines prepared to augment and reinforce the Active Component. (U.S. Marine Corps Photo By Lance Cpl. David Intriago)