U.S. Marines with 2nd Battalion, 4th Marines, 5th Marine Regiment, 1st Marine Division, patrol through an urban area during a training evolution at the Infantry Immersion Trainer on Marine Corps Base Camp Pendleton, California, July 16, 2019. The Infantry Immersion Trainer is a training area with various complexes that provide realistic and situational training to the various infantry units housed on MCB Camp Pendleton. (U.S. Marine Corps video by Lance Cpl. Drake Nickels)