U.S. Marines with Echo Battery, Battalion Landing Team 3/4, 31st Marine Expeditionary Unit, advance during a force on force exercise at Combined Arms Training Center Camp Fuji, Japan, March 4, 2021. The Marines from both platoons in Echo Battery competed against each other to enhance their capabilities as provisional infantry. The 31st MEU, the Marine Corps’ only continuously forward-deployed MEU, provides a flexible and lethal force ready to perform a wide range of military operations as the premier crisis response force in the Indo-Pacific region. - U.S. Marines with Echo Battery, Battalion Landing Team 3/4, 31st Marine Expeditionary Unit, advance during a force on force exercise at Combined Arms Training Center Camp Fuji, Japan, March 4, 2021. The Marines from both platoons in Echo Battery competed against each other to enhance their capabilities as provisional infantry. The 31st MEU, the Marine Corps’ only continuously forward-deployed MEU, provides a flexible and lethal force ready to perform a wide range of military operations as the premier crisis response force in the Indo-Pacific region.