Arthur Terry began training to be an officer in May of 1917 at the first Fort Myer camp in Arlington, Virginia. After three months of intensive training, on August 15th he was appointed as a captain in the Infantry Division of the Officers’ Reserve Corps. The War Department placed Arthur Terry on active duty as a captain starting that day, and he was required to report for duty by noon on August 27th to the commanding officer in Camp Lee. Camp Lee was located in Petersburg, Virginia. Captain Terry celebrated Thanksgiving at Camp Lee with his Company in the fall of 1917. He remained at Camp Lee until he left for Europe in May of 1918 as commander of the 320th Infantry, Company B.