An amphibious assault vehicle crewman with Alpha Company, 2nd Assault Amphibian Battalion, loads simulation rounds into a mounted MK-19 40mm grenade launcher during a live-fire gunnery range at Marine Corps Base Camp Lejeune, North Carolina, July 27, 2016. Marines with the battalion spent the day refining their marksmanship skill as individuals and their ability to work as a crew. - An amphibious assault vehicle crewman with Alpha Company, 2nd Assault Amphibian Battalion, loads simulation rounds into a mounted MK-19 40mm grenade launcher during a live-fire gunnery range at Marine Corps Base Camp Lejeune, North Carolina, July 27, 2016. Marines with the battalion spent the day refining their marksmanship skill as individuals and their ability to work as a crew.

An Amphibious Assault Vehicle with 2nd Assault Amphibian Battalion engages simulated enemy targets during a qualification course during Heavy Brigade Combat Team training at Marine Corps Base Camp Lejeune, North Carolina, April 5, 2016. The training allows the unit to strengthen their working relationship and maintain weapons proficiency to remain being a reliable asset for amphibious operations. - An Amphibious Assault Vehicle with 2nd Assault Amphibian Battalion engages simulated enemy targets during a qualification course during Heavy Brigade Combat Team training at Marine Corps Base Camp Lejeune, North Carolina, April 5, 2016. The training allows the unit to strengthen their working relationship and maintain weapons proficiency to remain being a reliable asset for amphibious operations.

A Marine with Alpha Company, 2nd Assault Amphibian Battalion, holds his post as his platoon prepares to ambush a notional enemy during Mountain Exercise 1-16, at Mountain Warfare Training Center in Bridgeport, California, Jan. 12, 2016. Marines with the unit took on the Mountain Warfare Course in preparation for Exercise Cold Response 16 in the near future. - A Marine with Alpha Company, 2nd Assault Amphibian Battalion, holds his post as his platoon prepares to ambush a notional enemy during Mountain Exercise 1-16, at Mountain Warfare Training Center in Bridgeport, California, Jan. 12, 2016. Marines with the unit took on the Mountain Warfare Course in preparation for Exercise Cold Response 16 in the near future.

An Amphibious Assault Vehicle and its’ crew with 2nd Assault Amphibian Battalion, prepares to begin the Heavy Brigade Combat Team qualification course at Marine Corps Base Camp Lejeune, North Carolina, Nov. 20, 2015. The HBCT qualification is a requirement for the AAV crew in order to deploy or attach to a Marine Expeditionary Unit.  - An Amphibious Assault Vehicle and its’ crew with 2nd Assault Amphibian Battalion, prepares to begin the Heavy Brigade Combat Team qualification course at Marine Corps Base Camp Lejeune, North Carolina, Nov. 20, 2015. The HBCT qualification is a requirement for the AAV crew in order to deploy or attach to a Marine Expeditionary Unit. 

Assault amphibious vehicles sit silently on Onslow Beach aboard Marine Corps Base Camp Lejeune, North Carolina, April 8, 2015. A platoon of AAVs, filled with a company of infantry Marines from Fox Company, 2nd Battalion, embarked on the USS Wasp off the coast of Onslow Beach to prepare for the next day’s mechanized infantry assault. (U.S. Marine Corps photo by Cpl. Justin T. Updegraff/ Released) - Assault amphibious vehicles sit silently on Onslow Beach aboard Marine Corps Base Camp Lejeune, North Carolina, April 8, 2015. A platoon of AAVs, filled with a company of infantry Marines from Fox Company, 2nd Battalion, embarked on the USS Wasp off the coast of Onslow Beach to prepare for the next day’s mechanized infantry assault. (U.S. Marine Corps photo by Cpl. Justin T. Updegraff/ Released)

Marines with 2nd Battalion, 2nd Marine Regiment, prepare to begin an assault on a simulated enemy base during movement to contact training aboard Camp Lejeune, N.C., April 9, 2015. Once the assault was completed, the Marines were required to prepare a defense in case of a counterattack. - Marines with 2nd Battalion, 2nd Marine Regiment, prepare to begin an assault on a simulated enemy base during movement to contact training aboard Camp Lejeune, N.C., April 9, 2015. Once the assault was completed, the Marines were required to prepare a defense in case of a counterattack.