In time of war the military authorities handle about one-third as many criminal cases as the federal government and the 48 tates combined. Both in war and peacetime the military justice system is the largest single system of criminal justice. The purpose of this article is to discuss the system of justice which exists under the Uniform Code of Military Justice2 and to query whether the existing system tends to retard the adjustment of the American civilian to military life. The discussion compares aspects of the system existing under U.C.M.J. with corresponding aspects of the civilian criminal law.