A Marine with 1st Battalion, 8th Marine Regiment fires rounds during the sniper marksmanship assessment as part of Integrated Training Exercise 1-16 aboard Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 24, 2015. During ITX, Marines demonstrate core infantry mission essential tasks while conducting offensive and defensive stability operations. (U.S. Marine Corps photo by Cpl. Immanuel M. Johnson/Released) - A Marine with 1st Battalion, 8th Marine Regiment fires rounds during the sniper marksmanship assessment as part of Integrated Training Exercise 1-16 aboard Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 24, 2015. During ITX, Marines demonstrate core infantry mission essential tasks while conducting offensive and defensive stability operations. (U.S. Marine Corps photo by Cpl. Immanuel M. Johnson/Released)

Marines with Alpha Company, 1st Battalion, 8th Marine Regiment advance to establish an offensive position during Integrated Training Exercise 1-16 aboard Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 26, 2015. During ITX, Marines demonstrate core infantry mission essential tasks while conducting offensive and defensive stability operations. - Marines with Alpha Company, 1st Battalion, 8th Marine Regiment advance to establish an offensive position during Integrated Training Exercise 1-16 aboard Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 26, 2015. During ITX, Marines demonstrate core infantry mission essential tasks while conducting offensive and defensive stability operations.

Lance Corporal John Roan, center, a squad leader with E Company, 2nd Battalion, 2nd Marine Regiment gets carried away from the simulated improvised explosive device blast by another Marine and Navy Corpsman while conducting counter-IED training during Integrated Training Exercise 1-16 at Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 29, 2015. Marines at ITX demonstrate core infantry mission essential tasks while conducting offensive and defensive operations. - Lance Corporal John Roan, center, a squad leader with E Company, 2nd Battalion, 2nd Marine Regiment gets carried away from the simulated improvised explosive device blast by another Marine and Navy Corpsman while conducting counter-IED training during Integrated Training Exercise 1-16 at Marine Air Ground Combat Center, Twentynine Palms, Calif., Oct. 29, 2015. Marines at ITX demonstrate core infantry mission essential tasks while conducting offensive and defensive operations.