U.S. Marines assigned to the Maritime Raid Force, 26th Marine Expeditionary Unit, brace while an entrance is breached during Eager Lion at the King Abdullah II Special Operations Training Center, Jordan, April 18, 2018. As part of Eager Lion, U.S. Navy and Marine Corps assets practice and rehearse a range of critical capabilities available to U.S. Central Command both afloat and ashore to promote stability in the region. - U.S. Marines assigned to the Maritime Raid Force, 26th Marine Expeditionary Unit, brace while an entrance is breached during Eager Lion at the King Abdullah II Special Operations Training Center, Jordan, April 18, 2018. As part of Eager Lion, U.S. Navy and Marine Corps assets practice and rehearse a range of critical capabilities available to U.S. Central Command both afloat and ashore to promote stability in the region.

Lance Cpl. Xavier Castro, a rifleman with 1st Battalion, 8th Marine Regiment, fires his M203 rifle-mounted grenade launcher during a M203 qualification aboard Marine Corps Base Camp Lejeune, North Carolina, April 5, 2015. The M203 grenade launcher fires various types of 40 mm ammunition, ranging from high explosive to ground marking rounds. - Lance Cpl. Xavier Castro, a rifleman with 1st Battalion, 8th Marine Regiment, fires his M203 rifle-mounted grenade launcher during a M203 qualification aboard Marine Corps Base Camp Lejeune, North Carolina, April 5, 2015. The M203 grenade launcher fires various types of 40 mm ammunition, ranging from high explosive to ground marking rounds.

Marines with 2nd Combat Engineer Battalion, 2nd Marine Division, train with the M203 40mm grenade launcher during live-fire training aboard Camp Lejeune, N.C., April 23, 2015. They also trained with the shoulder-launched multipurpose assault weapon, an 83mm portable weapon system that can fire high explosive, dual purpose rockets and high explosive anti-armor rockets. - Marines with 2nd Combat Engineer Battalion, 2nd Marine Division, train with the M203 40mm grenade launcher during live-fire training aboard Camp Lejeune, N.C., April 23, 2015. They also trained with the shoulder-launched multipurpose assault weapon, an 83mm portable weapon system that can fire high explosive, dual purpose rockets and high explosive anti-armor rockets.

Lance Cpl. Austin Steifer, a rifleman with 2nd Battalion, 2nd Marine Regiment, fires the M32 grenade launcher during a live-fire range aboard Camp Lejeune, N.C., April 9, 2015. The M32 is a semi-automatic grenade launcher capable of holding up to six 40mm rounds and reaching a distance up to 400 meters. (U.S. Marine Corps photo by Cpl. Michael Dye/Released)  - Lance Cpl. Austin Steifer, a rifleman with 2nd Battalion, 2nd Marine Regiment, fires the M32 grenade launcher during a live-fire range aboard Camp Lejeune, N.C., April 9, 2015. The M32 is a semi-automatic grenade launcher capable of holding up to six 40mm rounds and reaching a distance up to 400 meters. (U.S. Marine Corps photo by Cpl. Michael Dye/Released) 

Marines with Battery and Golf Co., 2nd Battalion, 6th Marines, capture a role-playing enemy within the confines of their shields during a riot control exercise aboard Camp Lejeune, N.C., March 24, 2015. The Marines moved swiftly to pull the enemy back through their formation, then closed back up in a defensive position as one straight line of shields. - Marines with Battery and Golf Co., 2nd Battalion, 6th Marines, capture a role-playing enemy within the confines of their shields during a riot control exercise aboard Camp Lejeune, N.C., March 24, 2015. The Marines moved swiftly to pull the enemy back through their formation, then closed back up in a defensive position as one straight line of shields.

Cpl. Sierra K. Tilson, rifleman with 3rd Platoon, Company A, Ground Combat Element Integrated Task Force, fires the M203 grenade launcher during a live-fire range at the Verona Loop training area, near Marine Corps Base Camp Lejeune, North Carolina, Jan. 14, 2015. Marines with Co. A conducted live-fire training, squad attacks, and patrolling in preparation for their upcoming assessment at Marine Corps Air Ground Combat Center Twentynine Palms, California. From October 2014 to July 2015, the GCEITF will conduct individual and collective level skills training in designated ground combat arms occupational specialties in order to facilitate the standards based assessment of the physical performance of Marines in a simulated operating environment performing specific ground combat arms tasks. - Cpl. Sierra K. Tilson, rifleman with 3rd Platoon, Company A, Ground Combat Element Integrated Task Force, fires the M203 grenade launcher during a live-fire range at the Verona Loop training area, near Marine Corps Base Camp Lejeune, North Carolina, Jan. 14, 2015. Marines with Co. A conducted live-fire training, squad attacks, and patrolling in preparation for their upcoming assessment at Marine Corps Air Ground Combat Center Twentynine Palms, California. From October 2014 to July 2015, the GCEITF will conduct individual and collective level skills training in designated ground combat arms occupational specialties in order to facilitate the standards based assessment of the physical performance of Marines in a simulated operating environment performing specific ground combat arms tasks.