U.S. Marine Corps Gunnery Sgt. Benjamin Dao, a chief

U.S. Marine Corps Gunnery Sgt. Benjamin Dao, a chief drill instructor with Delta Company, 2nd Recruit Training Battalion, discusses leadership with Marines of Delta and Oscar Company, 4th RTBN at Parris Island, S.C. June 6, 2018. The Four-Phase Training Model was implemented in November 2017 by extending the transition phase to two weeks in order to improve the transition from recruits into basic Marines. (U.S. Marine Corps photo by Chief Warrant Officer 2 Pete Thibodeau)