35.2 KT4 - Trench warfare on the Western Front, 1914-18

Enquiry Frame and Chronology

This is a Paper 3 depth key topic. You need precise knowledge of events, technology and public reaction, but you also need judgement about change over time. The specification has three linked strands:

Use this chronology as the spine of the topic:

The safest argument is not "nothing changed until 1918". The Western Front changed all the time. The problem was that defensive systems also changed. Each new method of attack produced a new defensive answer, so breakthrough remained extremely hard until 1918, when German exhaustion, Allied resources and better combined-arms methods came together.

From Movement to Attrition

In August 1914 the armies of western Europe expected movement. Germany's plan depended on rapid advance through Belgium and northern France. France planned offensive operations of its own. The British Expeditionary Force was small compared with the continental armies, but it was highly professional and joined the French left wing. The fighting at Mons, Le Cateau and the retreat to the Marne still belonged to a world of marching armies, cavalry screens, rail movement and attempts to envelop an enemy flank.

The First Battle of the Marne changed that rhythm. The German advance was stopped, and both sides then tried to turn the other's northern flank. This produced the so-called Race to the Sea. The phrase can mislead: it was not a literal race along the coast, but a series of attempts to outflank the enemy through northern France and Belgium. By late 1914 the open flank had disappeared. The front stretched from the Swiss frontier to the North Sea. Once that happened, a wide turning movement became almost impossible on the Western Front.

Trenches appeared because soldiers needed protection. Modern rifle fire, machine guns and artillery made standing in the open suicidal. A shallow scrape in the ground gave some protection from bullets and shell fragments. As both sides failed to break through, those temporary positions became linked and deepened. By 1915-16, the Western Front was not one ditch but a defensive system.

Entrenchment led to attrition because neither side could easily destroy the whole defensive system. A bombardment might wreck the front line, but it could also warn the enemy that an attack was coming. If the defenders had deep dugouts, they could shelter during the shelling and return to their machine guns when the barrage lifted. If attackers captured the first line, they then had to cross broken ground, reorganise, bring up ammunition and push on before the defender moved reserves by road or rail.

This created the central tactical problem of the Western Front: the attacker could sometimes win the first trench, but could not easily exploit success. The defender's rear-area movement was often better than the attacker's forward movement. Infantry advanced on foot across shell holes, mud and wire. Artillery was hard to move forward because horses and guns struggled over shattered ground. Telephone wires were cut by shellfire, radios were primitive, and runners could be killed before delivering messages. The deeper the attack went, the less control commanders had over it.

It was not automatically a foolish idea. In an industrial war, where whole economies produced shells, guns and recruits, commanders often believed that victory would come by exhausting the enemy faster than oneself. The moral problem was obvious: attrition measured success through casualties inflicted, ground taken and pressure maintained, while soldiers and families experienced it as loss.

For Britain, attrition became especially important from 1915-16. The small professional BEF of 1914 had been replaced by a much larger citizen army. Kitchener's volunteers, territorial units and later conscripts had to be trained for a kind of war no one had fully understood in 1914. Britain also had to support its allies. France had suffered enormous losses and in 1916 was under German pressure at Verdun. British offensives were therefore not only about British plans. They were part of coalition warfare.

The strongest judgement is that trench warfare emerged from the interaction of technology and geography. Machine guns, artillery and barbed wire made defence powerful; the continuous front removed the flank; railways helped defenders move reserves; weak communications made attacks hard to control. Commanders then turned to attrition because the tools for decisive mobile breakthrough did not yet exist in a reliable form.

Military Adjustment and New Technology

The British Army had to adjust because early assumptions about courage, mass infantry and preliminary bombardment did not solve trench warfare. The lesson of the Western Front was not simply "new weapons made war worse". It was that new weapons had to be coordinated. A machine gun, tank, gas shell or artillery fuse mattered only if it fitted into a wider plan of infantry, artillery, engineers, aircraft, supply and command.

Machine guns were central to the defensive strength of trench warfare. A well-sited machine gun could sweep no man's land, cover gaps in wire and fire along an attacking line. Early in the war, British units had relatively few machine guns, and many commanders still thought of them as supporting weapons rather than a main battlefield system. The creation of the Machine Gun Corps in 1915 and the spread of lighter guns such as the Lewis gun helped the British use automatic fire more flexibly. Even so, machine guns favoured defence because a fixed gun with good fields of fire could kill or pin down infantry before they reached the trench.

Gas was another attempted solution. On 22 April 1915, the Germans released chlorine gas at Second Ypres. Chlorine attacked the lungs and caused panic because soldiers had little protection at first. Britain used gas at Loos in September 1915, but the wind made cloud gas unpredictable and some blew back towards British troops. From 1916, gas was increasingly fired in shells, which made it less dependent on perfect wind conditions. Gas forced armies to develop masks, alarms and anti-gas discipline. Its psychological impact was huge, but it rarely produced a decisive breakthrough because defenders adapted and attackers still had to cross the battlefield.

Artillery was the most important arm on the Western Front. The Somme showed what went wrong when artillery was expected to destroy everything. A week-long bombardment warned the Germans, many shells failed to explode, shrapnel was poor against deep dugouts and wire, and German machine gunners could emerge when the shelling lifted. Later British artillery became more scientific. Counter-battery fire targeted enemy guns. Sound ranging, flash spotting and aerial reconnaissance helped locate batteries. Maps and predicted fire improved accuracy. The aim increasingly shifted from total destruction to neutralisation: keep defenders' heads down long enough for infantry to reach them.

Fuse 106 was part of this artillery adjustment. It was an instantaneous percussion fuse for high-explosive shells, introduced in useful numbers from late 1916 and 1917. Earlier shells could bury themselves before exploding, which made deep craters but often left barbed wire intact. Fuse 106 could detonate on contact with wire or the ground surface, so it was better for cutting wire and clearing a path without creating as much cratered ground for infantry to cross. For exam purposes, its significance is not that it "won the war". It shows how small technical improvements mattered when linked to better artillery planning.

The creeping barrage was another crucial technique. Instead of shelling for days and then stopping, artillery fired a moving curtain of shells just ahead of the infantry. The barrage "crept" forward according to a timetable, forcing defenders to stay under cover until attackers were close. This required careful maps, watches, training and discipline. If infantry followed too slowly, defenders recovered before they arrived. If infantry followed too closely, they risked casualties from their own shells. When it worked, the creeping barrage reduced the time German machine gunners had to return to their positions.

Tanks were designed to cross trenches, crush wire and attack machine-gun posts. They were first used by the British on 15 September 1916 at Flers-Courcelette during the Somme. Early tanks were slow, mechanically unreliable, hot, noisy and vulnerable to breakdown. Their first use created shock, but not decisive victory. By 1918 tanks were more useful because they were integrated with artillery, infantry and aircraft. At Amiens, tanks helped surprise and overwhelm German positions, although even then many broke down or were knocked out quickly.

The key adjustments can be compared like this:

By 1918 the British Army was much more capable than in 1916. That improvement came from painful experience, better staff work, more artillery skill, specialist weapons and a deeper understanding of combined arms. But every improvement had a cost. The Western Front was a learning environment in which mistakes were paid for in lives.

Public Perception and Controlled Reporting

British public perception of the Western Front changed in stages. In August 1914, opinion was not simply one wild rush to war. Many people were anxious or uncertain until the German invasion of Belgium and Sir Edward Grey's speech made intervention easier to defend. Once Britain entered the war, large numbers supported it as a necessary defence of Belgium, treaty obligations and national security. Recruitment posters, patriotic meetings and local pressure helped produce Kitchener's volunteer army.

Many civilians also expected a short war. This was understandable in 1914. Recent European wars had often been short, and pre-war military planning imagined decisive campaigns. The reality of trench warfare undermined those expectations. By Christmas 1914, the Western Front had not produced a quick victory. Families began to understand that this was a mass war of endurance.

The government tried to control what the public saw and read. The Defence of the Realm Act, passed in August 1914, gave the state wide powers over information judged harmful to the war effort. The Official Press Bureau handled press censorship and liaison. At first, reporters were largely prevented from accompanying the BEF. The army relied on official communiques, which were usually brief and cautious. Soldiers' letters were subject to censorship, especially if they revealed locations, operations or criticism that might damage morale or security.