With the american soldier goes american medicine. Backing him up by his side, with him in his advance. In wartime and in peace, the medical department carries on, fighting disease, healing and rehabilitating the sick and wounded and working to search out disease vectors to prevent, detect and control epidemics. To pursue this mission successfully, the medical department was backed up by a farflung network of laboratories stretching from north to south, from east to west. Clinical, Public Health and Research Laboratories were required everywhere. Diseases new to the army doctor were being encountered, new procedures, methods of treatment and control had to be developed and evaluated. Operation and combat under extreme heat and cold produced problems that were a challenge to the medical department and its laboratories. Behind this vast medical Laboratory Organization which followed the armies to every distant outpost on our fighting front were the Mission Divisions and services of the Su