In time of war hospitalization and evacuation are essential to the armed forces. Military hospitals are provided for the treatment of military personnel while being sick or injured. Casualties were given emergency treatment at a series of medical installations established in the forward areas of combat zones. In order to furnish as near to the front lines as possible, a higher type of medical treatment than first aid or emergency medical care, Hospitals, either «fixed» or designed for easy movement, «mobile» hospitals were established. Mobile hospitals, such as surgical, evacuation, and convalescent hospitals were usually assigned to field divisions and armies.
Lt. Colonel Philip Baxter served in four «fixed» general hospitals: 187th (Everleigh), 177th (Le Mans), 15th and 91th (Liège).