U.S. Army Spc. Mitchell Keeton, 688th Rapid Port Opening Element, 833rd Transportation Battalion, 597th Transportation Brigade, Defense Travel System technician, stands in formation at Fort Eustis, Va., June 11, 2015. Soldiers stood in formation with their units before an installation-wide run celebrating the Army’s 240th birthday. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)

A member of the Joint Task Force-Civil Support holds the unit’s guidon before the U.S. Army birthday run at Fort Eustis, Va., June 11, 2015. During the celebration, each unit ran 2.2 miles in formation to honor the milestone. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)

Fort Eustis leadership stands at attention before the U.S. Army Birthday run at Fort Eustis, Va., June 11, 2015. Soldiers ran 2.2 miles to kick-off the 240th Army birthday celebration at the installation. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)

U.S. Army Maj. Gen. Rex Spitler, U.S. Army Training and Doctrine Command deputy chief of staff, speaks to Soldiers before the Army Birthday run at Fort Eustis, Va., June 11, 2015. Spitler thanked the runners for participating in the event and wished them a happy Army birthday. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)

U.S. Army Soldiers march in formation before the Army birthday run at Fort Eustis, Va., June 11, 2015. The Soldiers used the run as a way to emphasize esprit de corps and to celebrate the 240th birthday of the Army. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)

U.S. Army Maj. Gen. Rex Spitler, U.S. Army Training and Doctrine Command deputy chief of staff, renders a salute during the Army birthday run at Fort Eustis, Va., June 11, 2015. Spitler, along with other Fort Eustis leadership, cheered on runners as they finished the 2.2 mile run in honor of the celebration. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)

Formations of U.S. Army Soldiers, near the finish line during take part in the Army birthday run at Fort Eustis, Va., June 11, 2015. Throughout the event, Soldiers shouted cadences and encouraging words to fellow Service members to enhance esprit de corps. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)