Noncommissioned officers with the 31st Marine Expeditionary Unit toss medicine balls during a Force Fitness Instructor led High Intensity Tactical Training session at Camp Hansen, Okinawa, Japan, June 8, 2018. The 31st MEU is adopting an NCO-led FFI program to improve overall physical fitness while reducing injury and building unit morale. The 31st MEU, the Marine Corps' only continuously forward-deployed MEU, provides a flexible force ready to perform a wide-range of military operations. - Noncommissioned officers with the 31st Marine Expeditionary Unit toss medicine balls during a Force Fitness Instructor led High Intensity Tactical Training session at Camp Hansen, Okinawa, Japan, June 8, 2018. The 31st MEU is adopting an NCO-led FFI program to improve overall physical fitness while reducing injury and building unit morale. The 31st MEU, the Marine Corps' only continuously forward-deployed MEU, provides a flexible force ready to perform a wide-range of military operations.