Marines with Battalion Landing Team, 1st Battalion, 5th Marines, 31st Marine Expeditionary Unit conduct a battle sight zero range on Camp Hansen, Okinawa, Japan, Nov. 26, 2019. A BZO range is used to adjust the settings of the Marines’ Rifle Combat Optics and ensure their accuracy. 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.