3rd Battalion, 5th Marine Regiment

U.S. Marines with Motor Transport Platoon, 5th Marine Regiment, 1st Marine Division, get a first hand look on how the skills they learn in the Marine Corps transfer to the civilian sector when they shadow service technicians for a day. (U.S. Marine Corps photo by Cpl. Joseph Prado)

U.S. Marine Corps Staff Sgt. Shane Armstrong, an artillery cannon operator with 5th Battalion, 11th Marine Regiment, 1st Marine Division, checks a stack of M270 rockets during exercise Steel Knight (SK) 19 at Marine Corps Base Camp Pendleton, California, Dec. 7, 2018. SK19 is an annual training exercise and assesses the 1st Marine Division’s ability to conduct ground combat operations against a peer or near-peer adversary. The exercise challenges the division’s commanders, staff, and units in a dynamic scenario against a reactive and opposing force to refine the units’ command and control, interoperability, and fundamental warfighting skills. (U.S. Marine Corps photo by Cpl. Audrey M. C. Rampton)

A U.S. Marine Corps M142 High-mobility artillery rocket system fires a M270 rocket during exercise Steel Knight (SK) 19 at Army Facility Dugway Proving Ground, Utah, Dec. 7, 2018. SK19 is an annual training exercise and assesses the 1st Marine Division’s ability to conduct ground combat operations against a peer or near-peer adversary. The exercise challenges the division’s commanders, staff, and units in a dynamic scenario against a reactive and opposing force to refine the units’ command and control, interoperability, and fundamental warfighting skills. (U.S. Marine Corps photo by Cpl. Audrey M. C. Rampton)

U.S. Marine Corps Cpl. Ramon Trevino, an infantry Marine with 1st Battalion, 5th Marine Regiment, participates in a decontamination drill during Steel Knight 2019 (SK19) on Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Dec. 06, 2018. SK19 is an annual training exercise and assesses the 1st Marine Division’s ability to conduct ground combat operations against a peer or near-peer adversary. The exercise challenges the division’s commanders, staff, and units in a dynamic scenario against a reactive and opposing force to refine the units’ command and control, interoperability, and fundamental warfighting skills. (U.S. Marine Corps photo by Cpl. Rhita Daniel)

U.S. Marine Corps LCpl. Jeremy Yeager, a machine gunner with 1st Battalion, 5th Marine Regiment, participates in a simulated air assault during Steel Knight 2019 (SK19) on Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Dec. 05, 2018. SK19 is an annual training exercise and assesses the 1st Marine Division’s ability to conduct ground combat operations against a peer or near-peer adversary. The exercise challenges the division’s commanders, staff, and units in a dynamic scenario against a reactive and opposing force to refine the units’ command and control, interoperability, and fundamental warfighting skills. (U.S. Marine Corps photo by Cpl. Rhita Daniel)

U.S. Marines with 1st Battalion, 5th Marine Regiment, participate in a simulated air assault during Steel Knight 2019 (SK19) on Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Dec. 05, 2018. SK19 is an annual training exercise and assesses the 1st Marine Division’s ability to conduct ground combat operations against a peer or near-peer adversary. The exercise challenges the division’s commanders, staff, and units in a dynamic scenario against a reactive and opposing force to refine the units’ command and control, interoperability, and fundamental warfighting skills. (U.S. Marine Corps photo by Cpl. Rhita Daniel)

U.S. Marine Corps Veterans salute during the 5th Marines Vietnam War Memorial unveiling ceremony in the Camp San Mateo Memorial Garden at Marine Corps Base Camp Pendleton, Calif., May 28, 2018. The memorial is inscribed with the names of 2,706 Marines and sailors who gave their lives serving our great nation. (U.S. photo by Lance Cpl. Rhita Daniel)

U.S. Marine Corps Lt. Col. John Gianopoulos, the commanding officer of 5th Marine Regiment, 1st Marine Division, speaks during the 5th Marines Vietnam War Memorial unveiling ceremony in the Camp San Mateo Memorial Garden at Marine Corps Base Camp Pendleton, Calif., May 28, 2018. The memorial is inscribed with the names of 2,706 Marines and sailors who gave their lives serving our great nation. (U.S. photo by Lance Cpl. Rhita Daniel)

U.S. Marine Corps Cpl. Ramon Trevino, an infantry Marine with 1st Battalion, 5th Marine Regiment, participates in a training flight in preparation for Steel Knight 2019 on Marine Corps Base Camp Pendleton, Calif., Nov. 27, 2018. SK19 is an annual training exercise and assesses the 1st Marine Division’s ability to conduct ground combat operations against a peer or near-peer adversary. The exercise challenges the division’s commanders, staff, and units in a dynamic scenario against a reactive and opposing force to refine the units’ command and control, interoperability, and fundamental warfighting skills. (U.S. Marine Corps photo by Cpl. Rhita Daniel)

A U.S. Marine with the 1st Battalion, 5th Marine Regiment participates in a training flight in preparation for Steel Knight 2019 on Marine Corps Base Camp Pendleton, Nov. 27, 2018. SK19 is an annual training exercise and assesses the 1st marine Division’s ability to conduct ground combat operations against a peer or near-peer adversary. The exercise challenges the division’s commanders, staff, and units in a dynamic in a dynamic scenario against a reactive and thinking opposing force to refine the units’ command and control, interoperability, and fundamental warfighting skills. (U.S. Marine Corps photo by Cpl. Rhita Daniel)

Retired U.S. Marine Corps Chief Warrant Officer 4 Hershel “Woody” Williams, the last surviving Medal of Honor recipient of the battle of Iwo Jima, center, greets Marines during his visit to the 5th Marine Regiment Vietnam War Memorial at Marine Corps Base Camp Pendleton, Calif., May 29, 2018. Williams visited the newly unveiled memorial to honor the Marines and sailors who gave their lives guarding our great nation. (U.S. Marine Corps photo by Lance Cpl. Alexa M. Hernandez)

U.S. Marine Corps Maj. Gen. Eric Smith, the commanding general of 1st Marine Division, speaks during the 5th Marines Vietnam War Memorial unveiling ceremony at Marine Corps Base Camp Pendleton, Calif., May 28, 2018. The memorial has been added to the 5th Marines Memorial Garden to honor and remember the Marines and sailors with the unit who gave their lives guarding our great nation. (U.S. Marine Corps photo by Lance Cpl. Ryan Kierkegaard)