July 23, 1918

1918:    The Director of the Army Air Service orders every flying field in the United States to have an air ambulance. This was based on the February 1918 efforts of Maj Nelson E. Driver, a medical officer, and Captain William C. Ocker, Commander of Flight Training at Gerstner Field, Louisiana, to modify the rear cockpit seat of a JN-4 Jenny to accommodate a patient in a semi-reclining position.