When the United States entered World War I, the U.S. Army, itself a constabulary force of less than 200,000 troops, had a dental staff of just 86 officers, a ratio of roughly one dentist for every 2,350 patients. At war's end on Nov. 11, 1918, the American Expeditionary Forces had swelled to more than 4.7 million troops and the Army Dental ...Web