The Somme at 110: What Happened on the Deadliest Day

At 7:28 a.m. on 1 July 1916, ten mines detonated beneath the German lines near La Boisselle. The ground shook sixty miles away. Soldiers who had spent weeks in the chalk tunnels beneath No Man's Land had packed them with tens of thousands of pounds of explosive. The blast sent a column of earth hundreds of feet into the air. It was the loudest man-made sound in history up to that point.

Two minutes later, the whistles blew. Roughly 120,000 British and Dominion soldiers climbed out of their trenches and walked — many were ordered to walk, not run — toward the German lines. The artillery barrage that was supposed to have destroyed those lines had largely failed. The German soldiers, sheltering thirty feet underground in concrete bunkers, emerged, set up their machine guns, and opened fire.

By midnight, the British Army had suffered 57,470 casualties. Of those, 19,240 men were dead. It remains the single deadliest day in the history of the British Army. Nothing before or since has come close.

Why the Somme? The Strategic Logic Behind the Slaughter

The Battle of the Somme was not chosen for its terrain. The rolling chalk downland of Picardy was not the ideal ground for a breakthrough. The Somme sector was chosen partly because it was where the British and French lines met — a joint offensive would relieve pressure on the French Army, which was being bled white at Verdun, roughly 150 miles to the southeast.

French commander Joseph Joffre had been pressing his British counterpart Douglas Haig for a major offensive all year. By the summer of 1916, Verdun had become catastrophic. The French needed the Germans to divert troops northward. The Somme was the answer. Whatever the ground looked like, the offensive had to happen — and it had to happen soon.

Haig believed a sustained artillery bombardment could cut the German wire and destroy the deep bunkers. For seven days before the assault, nearly 1,500 British guns fired over 1.5 million shells along a roughly fourteen-mile front. Soldiers were told the wire would be cut. Some were told the German trenches would be empty. They were not.

The Guns That Did Not Do Enough

The preliminary bombardment was the largest the British had ever attempted. It also had devastating flaws. Roughly one third of the shells were duds — poorly manufactured under wartime production pressure. Many of the guns were worn and inaccurate. Crucially, the British lacked sufficient high-explosive shells to destroy the German deep dugouts; much of the barrage consisted of shrapnel, lethal in the open but nearly useless against reinforced concrete and chalk.

When the bombardment lifted at 7:30 a.m. and the men climbed out, the German soldiers had approximately two minutes to get from their bunkers to the parapet. In many sectors, that was enough. Pte. W. J. Senescall of the Cambridge Battalion later recalled hearing the machine guns open up almost immediately — a sound, he said, like tearing calico. That sound did not stop.

In some sectors the story was different. Near Mametz, and at Montauban in the south, British and French units achieved their objectives on the first day. The problem was catastrophically uneven. While men died in the thousands in the north near Beaumont-Hamel and Serre, gains were being consolidated in the south. The battle's opening day was not one disaster — it was dozens of separate battles, some successful, most not.

The Pals Battalions and the Towns That Grieved

One of the peculiarities of the British Army in 1916 was the Pals Battalion system. When Kitchener called for volunteers in 1914, men were encouraged to enlist with friends, neighbors, and workmates — the idea being that familiarity would strengthen unit cohesion. It did. It also meant that when a battalion was shattered, an entire town could lose a generation in a single morning.

The Accrington Pals — officially the 11th Battalion East Lancashire Regiment — lost 584 men killed or wounded out of 720 who attacked on 1 July. The news reached Accrington days later. The town of roughly 45,000 people was devastated in a way that was personal, specific, and street-by-street. Almost every family knew someone. Almost every family lost someone.

The same story played out across Britain. Sheffield, Barnsley, Bradford, Grimsby — each had sent its Pals battalions forward that morning. The telegrams arrived in clusters, because the men had died in clusters. This concentrated grief would shape British memory of the First World War for the next century.

The Battle After the First Day

The Battle of the Somme did not end on 1 July 1916. It continued for 141 days, finally stopping in mid-November when cold and mud made further operations impossible. Over those months, the front line moved roughly six miles at its deepest point of advance. The total Allied casualties — British, Dominion, and French — exceeded 600,000. German casualties were also severe, estimated at between 400,000 and 500,000, though exact figures remain debated.

During the Somme, on 15 September 1916, tanks were used in battle for the first time in history. The Mark I tank was mechanical and unreliable, but its debut at Flers-Courcelette showed commanders something that would reshape warfare over the following decades.

The Somme also produced one of the defining acts of wartime remembrance. On 1 July each year, at the Thiepval Memorial — which bears the names of 72,195 British and South African soldiers with no known grave — the Last Post is sounded. The memorial, designed by Edwin Lutyens, stands on the ridge where some of the heaviest fighting occurred. It is a place where the numbers stop being numbers.

Why 110 Years On, the Somme Still Demands Remembrance

The Somme entered British consciousness differently from almost any other battle. It arrived not as a distant imperial campaign but as something that happened to the men next door, to the boy from the factory floor, to the schoolmaster and the clerk and the miner. The scale of loss on a single day produced a kind of national wound that was never fully closed.

Historians continue to debate Haig's decisions, the adequacy of the artillery plan, and whether the objectives could ever have been achieved in the way planned. These are legitimate questions. But beyond the strategic arguments lies something simpler: 19,240 men did not come home on 1 July 1916. Their names are on memorials across Picardy and in towns across Britain, carved in stone because stone seemed the only thing equal to that kind of permanence.

To remember the Somme at 110 years is not to relitigate the decisions of generals. It is to keep faith with the men who climbed out of the trenches when the whistle blew — who did what they were told to do, in a landscape that had no mercy, on the longest day most of them ever lived.

For the full context of the Somme within the wider war — the causes, the campaigns, and the lasting consequences — World War 1: A Complete History of WW1 and its Modern Impact tells the story from beginning to end. Get the book on Amazon →