A U.S. Marine with the 2nd Marine Division cleans an M777 prior to staging it in a Marine Corps Prepositioning Program cave to await the next time it will be called to action, July 4, 2016. The Howitzer was used during Exercise Saber Strike 16, and is meticulously maintained, ensuring it can be pulled and sent to the fight anywhere at any time. (U.S. Marine Corps photo by Sgt. Shawn Valosin/Released)