Bougainville I - U.S. Marine Corps Pfc. Julian Gonzalez, rifleman with Echo Co., 2nd Battalion, 3rd Marine Regiment, takes cover on a re-supply patrol during exercise Bougainville I at Kahuku Training Area, Hawaii, March 20, 2019. Bougainville I is a pre-deployment training exercise that enhances the unit’s proficiency, cohesion and combat readiness. (U.S. Marine Corps photo by Lance Cpl. Jacob Wilson)

180310-M-MI959-002.JPG - U.S. Marine Pfc. Angel Reveles fires on enemy targets at the Ulupau Range Training Facility on Marine Corps Base Hawaii, March 10, 2018. Bougainville I is used to train Marines to fight at the small-unit level and build their proficiency for future deployments. (U.S. Marine Corps photo by Pfc. Trevor Rowett)

180312-M-MI959-009.JPG - U.S. Marines touch down and set up security during Exercise Bougainville I at Kahuku Training Area, Hawaii, March 12, 2018. Bougainville I is used to train Marines to fight at the small-unit level and build their proficiency for future deployments. The Marines are with Company B, 1st Battalion, 3d Marine Regiment. (U.S. Marine Corps photo by Pfc. Trevor Rowett)