Injuries, Illnesses and Gas Attacks

Why soldiers needed medical care

On the British sector of the Western Front in Flanders and northern France, between 1914 and 1918, soldiers faced two overlapping threats: illness from their living conditions and injury from weapons. Medical staff therefore had to deal with more than battlefield wounds. Men could become unable to fight because of damaged feet, fever or the psychological strain of combat, even without being hit.

The trench environment also made wounds more dangerous. Mud, dirty clothing and contaminated soil could introduce bacteria into an injury. A soldier might survive the initial impact of a bullet or shell fragment but then develop a life-threatening infection.

Cold and wet conditions: trench foot

Heavy rainfall flooded trenches and left soldiers standing in mud and water. Prolonged exposure to cold and wet conditions could cause trench foot. Tight boots could make the problem worse by restricting blood circulation.

Affected feet became swollen, numb and foul-smelling. In severe cases, tissue died and gangrene developed. This was not simply an uncomfortable condition: a soldier might be unable to walk, and amputation could become necessary when damage was severe.

Prevention meant reducing the feet’s exposure to moisture. Soldiers changed their socks, rubbed their feet with whale oil or grease, and used duckboards—wooden walkways laid above the muddy trench floor. These measures show the connection between trench conditions and health: keeping soldiers’ feet dry could prevent a condition that otherwise removed them from duty.

Infestation and disease: trench fever

Dirty conditions and difficulty keeping clothing clean allowed lice infestations to thrive. Trench fever, spread by body lice, caused a high temperature, headaches and muscle pains. It could leave a soldier too ill to carry out his duties.

Quinine was tried unsuccessfully as a treatment, and patients generally needed rest while the fever passed. Disinfecting clothing and using delousing stations tackled the cause by removing lice. This differed from trench-foot prevention: trench foot required protection from cold and moisture, whereas trench fever required control of an insect that spread disease.

The psychological strain of warfare

Constant shellfire, the threat of death, witnessing violence and lack of sleep placed soldiers under extreme strain. Shell shock was the wartime term used for a range of symptoms associated with this experience. These included shaking, nightmares, exhaustion and mental breakdown. Some symptoms overlap with what would now be recognised as post-traumatic stress, but shell shock was a broader historical label rather than a precise modern diagnosis.

Severe cases could be sent back to Britain for rest and treatment. However, understanding and responses were uneven. Some sufferers were accused of cowardice or lack of discipline and faced punishment rather than sympathetic medical care. This made psychological suffering a medical problem complicated by military attitudes.

Bullets and explosives caused different kinds of wounds

Rifles and machine guns fired bullets that could penetrate the body, damage organs and fracture bones. A bullet could also push pieces of dirty uniform into the wound. The injury therefore involved both physical damage and a risk of infection.

Exploding artillery shells could tear away limbs and scatter shrapnel: small metal pieces or balls that struck soldiers at speed. Fragments could become embedded in the body, damaging tissue and bones. Soldiers exposed in no-man’s-land were especially vulnerable because they lacked the protection of trench cover.

Explosive injuries could be extensive rather than confined to a single small wound. They created a need for urgent medical care, and severe limb damage could lead to amputation. Large numbers of casualties arriving after bombardments also placed medical staff under intense pressure.

Why wound infection was so dangerous

The Western Front included farmland whose soil contained bacteria associated with manure and fertiliser. When bullets or shrapnel drove soil and dirty fabric into damaged tissue, they could introduce infection at the moment the wound occurred.

Two particularly serious infections were tetanus and gas gangrene. Tetanus caused severe muscle stiffness and spasms; anti-tetanus injections helped reduce its impact. Gas gangrene caused damaged tissue to die and could spread rapidly, making the wound extremely dangerous.

Gas gangrene was a wound infection, not an effect of poison gas. The distinction matters because these problems had different causes: bacteria entered damaged tissue in one case, while a chemical weapon harmed a soldier in the other.

Head injuries and the Brodie helmet

In 1914, British soldiers wore soft caps, which offered little protection from shell fragments. Head injuries were therefore a serious problem alongside wounds to the rest of the body.

The Brodie steel helmet, introduced in 1915, provided better protection than a cloth cap, particularly against fragments from explosions. It was a preventive response to the nature of modern warfare: protecting the head could reduce injury before medical treatment became necessary. It did not make soldiers immune to bullets or shellfire.

Gas attacks: physical harm and fear

Poison gas added a different kind of danger. Instead of striking the body like a bullet or fragment, it could harm soldiers as they breathed it in or were exposed to it. Depending on the gas, effects included coughing, choking, damage to the eyes or blindness, and blistering of the skin. Severe exposure could be fatal.

Gas attacks also caused intense fear. A soldier could face an advancing cloud rather than a visible individual attacker, while those affected might struggle desperately to breathe. Their psychological impact was therefore greater than death totals alone would suggest.

Early improvised protection included cloths soaked in urine held over the mouth. Protective gas masks were issued during 1915 as the army responded to the threat. Like steel helmets and measures to keep feet dry, gas protection illustrates an important connection: preventing harm was essential because treating its consequences could be difficult.

Together, these conditions created a varied medical challenge. Doctors and other medical staff faced illness, psychological trauma, severe physical damage and infection—not simply one standard kind of battlefield casualty.

Illness from trench conditions

• Trench foot: prolonged cold and wet, worsened by tight boots → swollen, numb feet; severe tissue damage could require amputation. Prevention: dry socks, duckboards and whale oil or grease.
• Trench fever: spread by body lice → fever, headaches and muscle pains. Prevention: disinfect clothing and delouse soldiers.
• Shell shock: combat trauma, constant noise and poor sleep → shaking, nightmares and breakdown. Responses ranged from rest and treatment to accusations of cowardice.