U.S. Marines training in the desert - U.S. Marines with 1st Battalion, 1st Marine Regiment, 1st Marine Division, determine the distance of targets during the simultaneous ground assault portion of Marine Air Ground Task Force Distributed Maneuver Exercise (MDMX) on Marine Corps Air Ground Combat Center, Twentynine Palms, California, Feb. 14, 2023. MDMX is a maneuver exercise that incorporates air, ground, and logistics operations to create favorable conditions for the Joint Force. (U.S. Marine Corps photo by Sgt. Armando Elizalde)

U.S. Marines with 1st Battalion, 1st Marine Regiment, help one another complete an obstacle during the Frontline Leaders Course at Robertson Barracks, Northern Territory, Australia, Sept. 9, 2016. The course is intended to be an addition to the Marine Corps Lance Corporal’s Seminar, Corporal's Course, and Sergeant's Course. The course instills knowledge and leadership skills to positively impact those under their charge and the future of the Marine Corps. 1st Battalion, 1st Marine Regiment, created the course and this will be the first time the course has been officially conducted. - U.S. Marines with 1st Battalion, 1st Marine Regiment, help one another complete an obstacle during the Frontline Leaders Course at Robertson Barracks, Northern Territory, Australia, Sept. 9, 2016. The course is intended to be an addition to the Marine Corps Lance Corporal’s Seminar, Corporal's Course, and Sergeant's Course. The course instills knowledge and leadership skills to positively impact those under their charge and the future of the Marine Corps. 1st Battalion, 1st Marine Regiment, created the course and this will be the first time the course has been officially conducted.

Sgt. Jose Arroyo, a competitor with the Marine Corps Shooting Team, fires his M16A4 service rifle during the section match May 17, 2016 at Puckapunyal Military Area, Victoria, Australia. The event is part of Australian Army Skill at Arms Meeting 2016, a competitive marksmanship event that evaluates the shooting skills of the competitors. The section match consisted of two running portions and two firing portions where teams were evaluated on both skill and swiftness as a marksman. - Sgt. Jose Arroyo, a competitor with the Marine Corps Shooting Team, fires his M16A4 service rifle during the section match May 17, 2016 at Puckapunyal Military Area, Victoria, Australia. The event is part of Australian Army Skill at Arms Meeting 2016, a competitive marksmanship event that evaluates the shooting skills of the competitors. The section match consisted of two running portions and two firing portions where teams were evaluated on both skill and swiftness as a marksman.

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U.S. Marine Sgt. Erik Maehler, left, demonstrates loading a M9 Beretta pistol to Hospital Corpsman 1st Class Sunshine Padilla aboard the amphibious assault ship USS Essex (LHD 2). Maehler is a member of the 15th Marine Expeditionary Unit’s Maritime Raid Force and Padilla is a hospital corpsman with Marine Medium Tiltrotor Squadron 161 (Reinforced), 15th MEU. The Marines practice marksmanship fundamentals dry to ensure safety and accuracy when shooting. The 15th MEU is embarked on the Essex Amphibious Ready Group and deployed to maintain regional security in the U.S. 5th Fleet area of operations. - U.S. Marine Sgt. Erik Maehler, left, demonstrates loading a M9 Beretta pistol to Hospital Corpsman 1st Class Sunshine Padilla aboard the amphibious assault ship USS Essex (LHD 2). Maehler is a member of the 15th Marine Expeditionary Unit’s Maritime Raid Force and Padilla is a hospital corpsman with Marine Medium Tiltrotor Squadron 161 (Reinforced), 15th MEU. The Marines practice marksmanship fundamentals dry to ensure safety and accuracy when shooting. The 15th MEU is embarked on the Essex Amphibious Ready Group and deployed to maintain regional security in the U.S. 5th Fleet area of operations.

Marines with 2nd Battalion, 1st Marine Division, I Marine Expeditionary Force, practice dry run raids in a simulated combat town during Special Operations Training Group’s Raid Leaders Course at Marine Corps Base Camp Pendleton, Calif., June 10, 2015. The two-week long course focuses on preparing Marines to successfully conduct combat raids. - Marines with 2nd Battalion, 1st Marine Division, I Marine Expeditionary Force, practice dry run raids in a simulated combat town during Special Operations Training Group’s Raid Leaders Course at Marine Corps Base Camp Pendleton, California, June 10, 2015. The two-week long course focuses on preparing Marines to successfully conduct combat raids.

U.S. Marine Lance Cpl. Zane Harmon fast ropes from a tower aboard Marine Corps Base Hawaii, May 12, 2015. Harmon is part of the 15th Marine Expeditionary Unit’s Maritime Raid Force security element. These Marines practice fast roping to ensure they are prepared for any type of mission during deployment. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released) - U.S. Marine Lance Cpl. Zane Harmon fast ropes from a tower aboard Marine Corps Base Hawaii, May 12, 2015. Harmon is part of the 15th Marine Expeditionary Unit’s Maritime Raid Force security element. These Marines practice fast roping to ensure they are prepared for any type of mission during deployment. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released)

Marines from Company I, 3rd Battalion, 1st Marine Regiment depart from an MV-22B Osprey to conduct a simulated embassy reinforcement training exercise at Joint Reserve Training Center Los Alamitos, California, April 11, 2015. The embassy reinforcement operation was a part of the 15th Marine Expeditionary Unit’s certification exercise, the last training exercise the MEU conducts before deployment. - Marines from Company I, 3rd Battalion, 1st Marine Regiment depart from an MV-22B Osprey to conduct a simulated embassy reinforcement training exercise at Joint Reserve Training Center Los Alamitos, California, April 11, 2015. The embassy reinforcement operation was a part of the 15th Marine Expeditionary Unit’s certification exercise, the last training exercise the MEU conducts before deployment.

A U.S. Marine with Lima Company, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, watches over the objective during an airfield seizure mission as part of Composite Training Unit Exercise on San Clemente Island, California., March 22, 2015. These Marines inserted onto the island to execute a raid and practice their urban combat skills. - A U.S. Marine with Lima Company, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, watches over the objective during an airfield seizure mission as part of Composite Training Unit Exercise on San Clemente Island, California., March 22, 2015. These Marines inserted onto the island to execute a raid and practice their urban combat skills.

U.S. Marine Pfc. Jacob Piazza, right, fires a .50-caliber machine gun at targets during realistic urban training aboard Camp Roberts, Calif., Dec. 14, 2014. Piazza is a rifleman with Weapons Company, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit. The training prepares the 15th MEU’s Marines for their upcoming deployment, enhancing their combat skills in environments similar to those they may find in future missions. - U.S. Marine Pfc. Jacob Piazza, right, fires a .50-caliber machine gun at targets during realistic urban training aboard Camp Roberts, Calif., Dec. 14, 2014. Piazza is a rifleman with Weapons Company, Battalion Landing Team 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit. The training prepares the 15th MEU’s Marines for their upcoming deployment, enhancing their combat skills in environments similar to those they may find in future missions.

U.S Marine Sgt. Eric Maehler holds security while conducting a raid during realistic urban training at Dodger Stadium in Los Angeles Dec. 8, 2014. Maehler is a team leader with the 15th Marine Expeditionary Unit’s Maritime Raid Force. RUT prepares the Marines of the 15th MEU for their upcoming deployment by enhancing their combat skills in environments they may encounter in future missions. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released) - U.S Marine Sgt. Eric Maehler holds security while conducting a raid during realistic urban training at Dodger Stadium in Los Angeles Dec. 8, 2014. Maehler is a team leader with the 15th Marine Expeditionary Unit’s Maritime Raid Force. RUT prepares the Marines of the 15th MEU for their upcoming deployment by enhancing their combat skills in environments they may encounter in future missions. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released)

U.S. Marines with the 15th Marine Expeditionary Unit’s Maritime Raid Force conduct a raid during realistic urban training aboard Camp San Luis Obispo, Calif., Dec. 5, 2014. RUT prepares the Marines of the 15th MEU for their upcoming deployment, enhancing their combat skills in environments similar to those they may find in future missions. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released) - U.S. Marines with the 15th Marine Expeditionary Unit’s Maritime Raid Force conduct a raid during realistic urban training aboard Camp San Luis Obispo, Calif., Dec. 5, 2014. RUT prepares the Marines of the 15th MEU for their upcoming deployment, enhancing their combat skills in environments similar to those they may find in future missions. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released)

U.S. Marines with Battalion Landing Team, 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, prepare to breach a door during a helicopter-raid exercise aboard Camp Pendleton, Calif., Oct. 16, 2014. BLT 3/1 is scheduled to deploy as the 15th MEU’s ground combat element next spring. (U.S. Marine Corps photo by Sgt. Emmanuel Ramos/Released) - U.S. Marines with Battalion Landing Team, 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit, prepare to breach a door during a helicopter-raid exercise aboard Camp Pendleton, Calif., Oct. 16, 2014. BLT 3/1 is scheduled to deploy as the 15th MEU’s ground combat element next spring. (U.S. Marine Corps photo by Sgt. Emmanuel Ramos/Released)