When the United States entered war in April 1917 the Army had 491 doctors on active duty; by the armistice 30,144 civilian physicians were serving. The base hospital unit, designed by a Cleveland surgeon, put six university hospitals in France in seventeen days. It was the series' clearest success, yet the units dissolved after the war and had to be rebuilt in 1939.
Sources differ on Base Hospital No. 4's sailing date, and Hodgins' presence in the 1917 crossing is unconfirmed. Statistics for American shell-shock cases and the share of the medical profession in uniform could not be verified.