found: U.S. War Dept. Annual Rept., 1918,v. 1, p. 704 (Medical Officers' Reserve Corps, the successor to the Medical Reserve Corps, came into existence on June 17, 1917. Most officers of the old Medical Reserve Corps were transferred to the new corps); 1919, v. 1, pt. 3, p. 2826 (The development of the organization of the personnel of the Medical Dept. for the fiscal year 1918-19 is divided into three phases. The period between June 30, 1918 and Aug. 7, 1918, when the Reserve, National Army, and National Guard automatically ceased to exist by changing designation to the Medical, Dental, and Veterinary Corps. The period between Aug 7, 1918 and Jan. 1, 1919, when the Reserve Corps was reestablished, and the period of reorganization, Jan. 1 to June 30, 1919. During the first period the Medical Corps consisted of the Medical Corps (permanent establishment), the Medical Reserve Corps (active and inactive status), and medical officers of the National Army and National Guard. During the second period all medical officers were carried in one corps, the officers comprising the corps being designated as temporary and permanent. The third period noted the discharge of temporary officers and the reorganization of the Medical Officers' Reserve Corps from among discharged temporary officers)
found: Medical Dept. of the U.S. Army in the World War, 1923,v. 1 (Army of the U.S. shall consist of Regular Army, Volunteer Army, Officers' Reserve Corps, Enlisted Reserve Corps, and National Guard while in the service of U.S.; Officers' Reserve Corps of the Regular Army shall consist of sections corresponding to various arms, staff corps, and depts. of the Regular Army; act of Congress approved June 3, 1916, provided for the abolition of the Medical Reserve Corps effective one year after passage and the commissioning of its members in the Officers' Reserve Corps; on Aug. 7, 1918 War Dept. had transferred all officers of the Medical Section, Officers' Reserve Corps on active duty into the U.S. Army)
