Marines provide over watch security during a raid on Combat Town, at the Central Training Area, Okinawa, Japan, Oct. 26, 2015. The raid was part of Blue Chromite 2016, a large-scale amphibious exercise that achieves high-level training at a low cost, while keeping naval forces in a forward-deployed posture. During Blue Chromite, participating units take advantage of on-island training resources, saving in transportation and logistics cost. The Marines are with Alpha Company, 1st Battalion, 2nd Marine Regiment, currently assigned to 4th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force, under the unit deployment program. (U.S. Marine Corps Photo by LCpl. Steven Tran/Released)