The First World War created an enormous demand for organised medical care. Wounded soldiers had to be treated close to the battlefield and moved through a network of medical units and hospitals, while doctors, nurses, stretcher bearers and ambulance personnel worked under extremely difficult conditions.
Medical Services and Evacuation in the First World War
Industrial warfare produced large numbers of casualties, often involving severe wounds caused by artillery, machine guns and shrapnel. Treating these casualties required more than the work of individual doctors. The British Army developed an increasingly organised system for providing first aid, collecting wounded soldiers, treating them close to the battlefield and moving them to hospitals further from the fighting.
The evacuation system was not simply a means of transporting wounded men. Each stage had a particular medical function, and the system changed during the war as medical services attempted to reduce deaths, improve treatment and cope with the enormous numbers of casualties produced by major battles.
Medical Care at the Front
Medical treatment began close to the battlefield. Regimental medical personnel and stretcher bearers worked under dangerous conditions to provide first aid and bring wounded soldiers away from the immediate fighting.
A wounded soldier might first reach a Regimental Aid Post, either making his own way there or being carried by stretcher bearers. From there he could be moved to an Advanced Dressing Station or Main Dressing Station, where wounds could be assessed, cleaned and dressed and decisions made about further treatment.
The conditions made this work extremely difficult. Trenches, shell holes, mud, barbed wire and continuing artillery fire could make the collection of casualties slow and dangerous. Stretcher bearers themselves suffered heavy casualties during major operations.
The National Archives records of stretcher bearer casualties provide contemporary evidence of the dangers faced by those collecting wounded soldiers.
Field Ambulances and Dressing Stations
Field Ambulances were mobile medical units responsible for collecting and treating casualties. They operated a network of Regimental Aid Posts, collecting posts and dressing stations and provided an important link between the front line and the more substantial medical facilities behind it.
Minor wounds could sometimes be treated and the soldier returned to duty after a short period of recovery. More serious wounds required further evacuation.
The movement of casualties depended upon a combination of stretcher bearers, horse-drawn transport, motor ambulances and, further from the front, trains, boats and ships.
Disease and Medical Conditions in the First World War provides further context for the work of medical units dealing with illness as well as battle wounds.
Casualty Clearing Stations
Casualty Clearing Stations (CCSs) became central to the evacuation system. They provided a place where large numbers of casualties could be assessed and treated before being returned to duty, retained for further treatment or evacuated to hospitals further behind the lines.
CCSs were increasingly equipped to provide substantial medical treatment. They could contain operating theatres, preparation areas, resuscitation wards and, in some cases, X-ray equipment.
During 1915, surgical services were increasingly brought into the CCS system, allowing seriously wounded soldiers to receive major treatment closer to the front. During 1916, efforts were made to move CCSs nearer to the fighting so that severely wounded men could receive treatment more quickly. Later in the war, the advance of German forces during the spring of 1918 meant that some CCSs had to be moved further back from the front.
The development of the CCS system illustrates the way in which medical evacuation and medical treatment became increasingly integrated during the war.
Surgery and Plastic Surgery in the First World War · X-Rays and Medical Imaging in the First World War
From the CCS to Base Hospitals
Not every casualty could be treated at the CCS. Soldiers whose condition was serious but stable enough to travel could be moved to base hospitals further from the fighting.
These hospitals provided more extensive and prolonged treatment. Casualties could be transported by motor ambulance, train, barge or other forms of transport depending upon their location and condition.
The system therefore created a series of stages between the battlefield and the hospital. Medical decisions at each stage determined whether a soldier would return to duty, remain for treatment or continue further along the evacuation chain.
Hospital Trains and Ships
Railways became an important part of the evacuation system. Casualties could be transported from medical facilities near the Western Front to hospitals further behind the lines and towards ports.
Hospital ships then carried wounded soldiers across the Channel to Britain, where they could be admitted to military or civilian hospitals for further treatment.
The evacuation chain therefore depended upon the wider transport infrastructure of the war. Medical treatment could not operate separately from railways, roads, ports, ships and the organisation required to move large numbers of casualties safely.
Medical Personnel
The system depended upon a large workforce. The Royal Army Medical Corps (RAMC) provided doctors and other medical personnel, while nurses and other staff worked in casualty clearing stations and hospitals.
The Queen Alexandra’s Imperial Military Nursing Service (QAIMNS), Territorial Force Nursing Service (TFNS) and Voluntary Aid Detachment (VAD) nurses all contributed to wartime medical care. Their work extended from casualty clearing stations to base hospitals and other medical facilities.
The experiences of medical personnel demonstrate that evacuation was not simply a technical process. It depended upon people working for long periods under dangerous and demanding conditions.
Shell Shock and Psychological Trauma in the First World War also provides context for the psychological pressures faced by soldiers and those treating them.
The Scale of the Medical Challenge
Major battles could produce enormous numbers of casualties within a short period. Medical services therefore had to be capable of expanding their response rapidly while maintaining the normal flow of sick and wounded men through the system.
The challenge was both medical and organisational. A wounded soldier’s chances of survival could depend upon how quickly he was reached, how effectively his wounds were treated, how rapidly he could be transported and whether the next medical unit had the capacity to treat him.
The evacuation system therefore became an important part of the development of modern military medicine.
Evacuation and Medical Developments
The organisation of evacuation was closely connected with developments in medical treatment. Casualty clearing stations provided an environment in which surgeons could perform increasingly complex operations, while X-ray equipment helped doctors diagnose some internal injuries.
Blood transfusion also became increasingly important in the treatment of severely wounded soldiers. The ability to move casualties through an organised medical system meant that specialist treatment could be provided at the appropriate stage.
Blood Transfusion in the First World War · Gas Warfare and Medical Treatment in the First World War
Wounds, Illness and Evacuation
The evacuation system dealt with more than battle wounds. Medical units also treated soldiers suffering from disease and other conditions caused or aggravated by military service.
Trench foot, infectious disease, gas injuries and other medical conditions could all place demands upon field ambulances, casualty clearing stations and hospitals. The distinction between medical and military problems was therefore often less clear than it might appear.
Disease and Medical Conditions in the First World War
The Evacuation System and the Western Front
The evacuation system developed particularly extensively on the Western Front, where prolonged industrial warfare produced enormous numbers of casualties. Its organisation was closely connected with the geography of the front, the railway network and the location of hospitals and ports.
The Western Front provides the wider military context for the development of this system, while the Battles and Campaigns of the First World War section provides routes into the major operations that generated many of the casualties treated by medical services.
Medicine in the First World War
Medical evacuation was one part of the wider transformation of medicine during the First World War. The scale and nature of industrial warfare also encouraged developments in surgery, plastic surgery, blood transfusion, X-ray diagnosis and the treatment of psychological trauma and disease.
This article forms part of the wider Medicine in the First World War section.
Further Reading
- Medicine on the Western Front, The National Archives — contemporary records covering medical services, casualty evacuation, treatment and the experiences of wounded soldiers.
- First World War medical services reports, Wellcome Collection — digitised Royal Army Medical Corps reports concerning medical services during major battles, including reports on transport and communications.
- First World War collections, Imperial War Museums — photographs, documents and objects relating to military hospitals, the Royal Army Medical Corps, nursing and the treatment of wounded soldiers.
- First World War collections, British Library — digitised primary sources and collections relating to the wider experience of the First World War.