US Marine Corps (USMC) Marines from Tango Battery, 5th Battalion (BN), 10th Marines, attached to 3rd Battalion (BN), 12th Marines, during a Unit Deployment Program (UDP), the back of a Medium Tactical Vehicle Replacement (MTVR) seven-ton truck keep an eye on their towed 155 mm howitzer M198 while moving via convoy to a location for a dry fire exercise in Japan