A U.S. Army Soldier assigned to 1-68th AR, 3rd Armored Brigade Combat Team, 4th Infantry Division, surveys the perimeters of a simulated environment during Decisive Action Rotation 21-06 at the National Training Center in Fort Irwin, Calif., April 16, 2020. Decisive Action Rotations at the National Training Center ensures that United States Army Units remains versatile, responsive and consistently available for current and future contingency operations.