It would be premature to attempt to survey with an air of finality the progress which has been made in medicine during the past five years. Many of the data bearing on this subject are still listed as being in the category of classified information, other data cannot be evaluated critically, and, finally, only the faint outlines of the total impact of the war on medicine are visible at the moment. However, it does appear timely to conduct an initial inquiry into the topic, and this paper, which necessarily is preliminary in nature, will be presented for the purpose of stimulating further thought on and analyses of this subject. In considering the question of "Medical Progress and Medical Education During the War," it is proposed to divide it into two main parts. The first will deal with certain of the scientific advances which were made in medicine during the war.