October 8, 2021 - U.S. Marines with 1st Battalion, 10th Marines in support of 3d Marines fire a M777 A2 Howitzer as part of the Regimental Air Assault Course during Service Level Training Exercise 1-22 (SLT1-22) at Marine Corps Air Ground Combat Center Twentynine Palms, California.
1st Battalion, 10th Marines provided indirect fire support for maneuver units throughout the battlespace, enabling 3d Marines to successfully conduct offensive and defensive operations.