An M1A1 Abrams Main Battle Tank with Company A, 1st Tank Battalion, advances along a road while receiving indirect-fire support from artillery during a Tank Mechanized Assault Course in the Quackenbush Training Area as part of Integrated Training Exercise 2-16 at Marine Corps Air Combat Center Twentynine Palms, Calif.Feb. 9, 2016. ITX is designed to prepare units for combat, under the most realistic conditions possible, focusing on battalion and squad level training. - An M1A1 Abrams Main Battle Tank with Company A, 1st Tank Battalion, advances along a road while receiving indirect-fire support from artillery during a Tank Mechanized Assault Course in the Quackenbush Training Area as part of Integrated Training Exercise 2-16 at Marine Corps Air Combat Center Twentynine Palms, Calif.Feb. 9, 2016. ITX is designed to prepare units for combat, under the most realistic conditions possible, focusing on battalion and squad level training.