U.S. Marines prepare to fire an M777 Howitzer during exercise KAMANDAG 3 at Colonel Ernesto P. Ravina Air Base, Philippines, Oct. 13. - U.S. Marines prepare to fire an M777 Howitzer during exercise KAMANDAG 3 at Colonel Ernesto P. Ravina Air Base, Philippines, Oct. 13.

U.S. Marine, Philippine Marine and Japan Ground Self-Defense Force members assault amphibious vehicles line up along the shore following an amphibious exercise as part of KAMANDAG 3 at Katungkulan Beach, Marine Barracks Gregorio Lim, Philippines, Oct. 12. - U.S. Marine, Philippine Marine and Japan Ground Self-Defense Force members assault amphibious vehicles line up along the shore following an amphibious exercise as part of KAMANDAG 3 at Katungkulan Beach, Marine Barracks Gregorio Lim, Philippines, Oct. 12.

U.S. Marines from Marine Corps Air Station Miramar spar in the ocean during Marine Corps martial arts instructor course 224-19 at Naval Air Station North Island, Calif., Oct. 9. 2019. The three-week MAI course trains marines to become martial arts instructors. - U.S. Marines from Marine Corps Air Station Miramar spar in the ocean during Marine Corps martial arts instructor course 224-19 at Naval Air Station North Island, Calif., Oct. 9. 2019. The three-week MAI course trains marines to become martial arts instructors.