Marines with Oscar Battery, 5th Battalion, 14th Marines, 4th Marine Division, conduct fire missions in support of Battalion Distributed Operations Course (BDOC), a sub-event of Integrated Training Exercise (ITX) 4-21 at Marine Corps Air Ground Combat Center Twentynine Palms, California on July 27, 2021. BDOC challenges a Marine Air-Ground Task Force (MAGTF) to execute offensive and defensive operations supported by air and ground assets in a geographically dispersed area of operations. MAGTF 25 is the first Reserve unit to conduct the BDOC, ensuring Marine Forces Reserve remains combat-ready. (U.S Marine Corps photo by Lance Cpl. David Intriago)