Despite his injuries, however, Captain Clark managed to recover within six weeks, although he was graded unfit to return to the infantry. As a result of his convalescence, he was transferred to the Supply Section of the First Army. In this position he served with Colonel John L. DeWitt, and supervised the daily provision of food for the men of the First Army, which earned Clark recognition at the higher levels of command. He stayed in this post until the end of hostilities on November 11, 1918. He then served with the Third Army in its occupation duties in Germany and returned to the United States in June 1919, just over a year after he was sent overseas.