The Battle of the Somme: The Plan That Failed Before It Began

A Plan Built on an Assumption

By the summer of 1916, the Western Front had been locked in stalemate for nearly two years. The British Army, alongside French forces, planned a massive offensive along the River Somme in northern France — intended to break through German lines, relieve pressure on the French at Verdun, and finally shift the war onto more favourable terms.

The plan seemed simple, on paper. For seven days before the infantry advanced, more than 1.5 million shells would fall on German positions — destroying their trenches, cutting the barbed wire in front of them, and killing or demoralising the defenders. Once the bombardment lifted, British infantry would advance across no man's land and occupy trenches that would already be, for all practical purposes, empty of resistance.

Why the Bombardment Failed

The plan's central assumption turned out to be badly wrong. Many of the shells fired during the week-long bombardment were of poor manufacturing quality and simply failed to explode — a consequence of Britain's rapidly expanded, inexperienced wartime munitions industry working at a pace that outstripped its quality control. Others were the wrong type of ammunition entirely: shrapnel shells, effective against soldiers in the open, did little against the deep, well-built German bunkers dug many metres underground.

German defenders, sheltering in bunkers that had taken years to construct, largely survived the week of shelling intact. When the bombardment finally lifted on the morning of 1 July, they had time to climb back to the surface, retrieve their machine guns, and man their firing positions — directly into the path of the advancing British infantry, who had been told the wire would be cut and the enemy destroyed.

The Worst Day in British Military History

At 7:30am on 1 July 1916, whistles blew along miles of British trenches, and soldiers began climbing up and out into no man's land. In several sectors, commanders had ordered their men to advance at a walking pace rather than a run — a decision based on the assumption that no live defenders remained to shoot at them, and a desire to keep formations orderly for the occupation that was meant to follow.

The barbed wire, which the week-long bombardment was meant to have destroyed, remained largely intact in many sectors. German machine gunners, very much alive, opened fire on men walking slowly toward them across open ground with nothing to shelter behind. By the end of the day, the British Army had suffered approximately 57,000 casualties — around 19,000 of them fatal — making 1 July 1916 the single worst day in the history of the British Army, before or since.

A Few Miles of Ground

The Battle of the Somme did not end on 1 July. It continued for four and a half more months, grinding through the summer and autumn of 1916 as both sides fed more men and material into the fighting. By the time it was finally called off on 18 November, total casualties on both sides exceeded one million — for a territorial advance of roughly six miles.

The battle became, alongside Verdun, one of the defining symbols of the First World War's particular horror: enormous industrial firepower combined with tactics that hadn't yet adapted to it, producing casualty figures that seemed to bear almost no relationship to the ground actually gained. It also permanently altered how the British public understood the war — the scale of loss on a single day was, and remains, difficult to comprehend even a century later.

What Historians Still Debate

Military historians remain divided over how much blame belongs with specific commanders versus the broader industrial and tactical limitations of the era. Some place significant responsibility on General Sir Douglas Haig and his subordinate commanders for persisting with the walking-pace advance in sectors where reconnaissance should have revealed the wire remained uncut and the bombardment had failed. Others argue that the technology and tactics of 1916 — inadequate communications between the front line and command, unreliable shells, no effective way to verify bombardment results before committing infantry — made a disaster of this scale close to unavoidable given what commanders could actually know in real time.

There's also genuine debate about the Somme's strategic value despite its catastrophic cost. Some historians argue the battle achieved its secondary purpose of relieving pressure on French forces at Verdun, and that the attritional damage inflicted on German forces over the following months contributed meaningfully to Germany's eventual exhaustion. Others view this as an after-the-fact justification for a battle whose immediate execution was a genuine catastrophe regardless of any longer-term strategic benefit.