Sgt. 1st Class Joe A. Galvan, a Platoon Sergeant assigned to D Troop, 1st Squadron, 11th Armored Cavalry Regiment, surveys the terrain for the enemies�' positions during Battle Period Three of a Decisive Action Rotation on Fort Irwin, Cal...

Sgt. 1st Class Joe A. Galvan, a Platoon Sergeant assigned to D Troop, 1st Squadron, 11th Armored Cavalry Regiment, surveys the terrain for the enemies?' positions during Battle Period Three of a Decisive Action Rotation on Fort Irwin, Calif., Jan. 28. The DA rotation enables the training unit to battle a military threat in a controlled environment. (U.S. Army photo by Sgt. David N. Beckstrom, 11th Armored Cavalry Regiment, Public Affairs / Released)