First Day On The Somme

What actually happened on the first day at the Somme

The First Day On The Somme took place on 1 July 1916. British forces attacked along a front stretching from the River Ancre in the north to south of Montauban. The goal was to break through the German lines in support of the French army pressure further south at Verdun. What followed was the deadliest day in British military history. Approximately 57,470 casualties were recorded, including around 19,240 killed. That number alone doesn't capture the full scope. Many of the wounded died in dressing stations or casualty clearing posts in the hours that followed, and the true figure likely runs higher.

Understanding the First Day On The Somme

British planning rested on a fundamental assumption that the pre-battle artillery barrage had destroyed German defenses and that the infantry could walk across no-man's land with minimal resistance. The plan called for a creeping barrage to lift after six minutes, with troops advancing just behind it. In practice, things went wrong almost immediately. Several key factors contributed to the disaster.

The artillery preparation had not achieved its primary objectives. Deep dugouts near Thiepval and Bazentin protected large numbers of German defenders from the shellfire. The German 2nd Army, commanded by General Fritz von Below, had constructed a three-line system of trenches with strongpoints that were largely bypassed rather than captured. Machine gun nests on the reverse slopes of ridges held intact and opened fire on advancing infantry moving across open ground. The timing of the explosion at Hawthorn Ridge was particularly problematic. The mine was detonated at 7:20 AM, ten minutes before the general infantry assault. The blast served as an unmistakable signal that the attack was imminent. German defenders in the sector manning the Hawthorn Ridge support line were alerted well before the British troops reached their positions. This gave them time to man their machine guns with shells already unlimbered and ready.

How the attack unfolded sector by sector

On the southern flank, where the terrain was less heavily fortified and German defenses were somewhat thinner, British units made significant progress. The 8th Division captured Montauban. The 34th Division took Bernafay Wood and Trônes Wood. These successes demonstrated what the attack could achieve when conditions were favorable and resistance was weaker. The central sector saw mixed results. The Canadian Corps at Beaumont-Hamel suffered catastrophic losses. The 1st Newfoundland Regiment, attached to the 29th Division, advanced with just over 800 men and lost approximately 710 casualties within a matter of minutes. Most of those casualties occurred before the Newfoundlanders even reached the German front trench. They were cut down in open ground by machine gun fire from Flers and other positions they had never expected to face. On the northern flank near the Ancre River, the attack failed almost entirely. The fortress village of Serre was held by the German 18th Division and was not captured. Reserves intended for the attack were deployed piecemeal rather than held as a coordinated follow-on force, a decision that reflected the initial underestimation of what might be required.

At Thiepval, the situation was particularly brutal. The village was fortified with concrete blockhouses and interconnected trenches that the artillery had failed to reduce. The 38th (Welsh) Division and elements of the 30th Division attacked here and were virtually destroyed as fighting units. The village would not fall until September, during a later phase of the offensive.

What goes wrong when you study this event without context

I spent considerable time cross-referencing unit war diaries with artillery observation reports after reading the standard popular accounts. The gap between what commanders believed had been achieved and what actually existed on the ground is striking. I ran into a specific problem when trying to reconcile the number of German prisoners taken on the first day against official British casualty returns. The records from XIII Corps and VIII Corps used different counting methods for wounded versus missing, which created inconsistencies when you tried to aggregate the data at divisional level.

The workaround was to consult the regimental histories directly and cross-check with the German side using the Bundesarchiv records from the 2nd Army staff. These showed that many soldiers reported as missing on the British side had actually been wounded and evacuated by German aid posts behind their lines, then later recorded as prisoners. The final reconciliation still left some figures unexplained, but it brought the casualty estimates closer together. If you are working with this material, do not trust the aggregated corps-level summaries. Go to the battalion war diaries.

Counter-intuitive points most people miss

One thing that surprises people is that the German defensive system was not primarily designed to stop an attack at the front trench. It was designed to absorb it. The forward zone was deliberately thin, perhaps two or three lines of trench spaced about 200 meters apart. The real defensive strength lay in the support and reserve lines, positioned on reverse slopes where British artillery observation could not effectively target them. This meant that even if the front trench was overrun, as it frequently was on 1 July, the attackers immediately faced fresh machine gun positions and artillery fire from beyond the crest of the ridge.

Another point concerns the British artillery. The common narrative is that it simply failed. The reality is more nuanced. A significant proportion of the shells fired were defective. Fuse timing was unreliable, and many rounds either failed to explode on impact or detonated prematurely in the air above the German trenches rather than in the dugout entrances they were meant to destroy. Field Marshal Haig and the GHQ were aware of these problems but had no effective alternative. The ammunition shortage meant they were forced to continue with the quality they had rather than delay the attack to improve it. It is also worth noting that the British infantry training at the time was inadequate for the conditions they faced. Officers were instructed to lead from the front, and junior commanders were expected to maintain unit cohesion across broken ground while under fire. This worked in theory. In practice, the combination of shell-cratered terrain, unexpected machine gun positions, and the disorienting effect of the creeping barrage lifting too far ahead or falling short meant that many units lost their officers within the first few minutes of the advance. Battalion organizations dissolved into small groups of men operating independently.

Limits of what we can know

Any account of the First Day On The Somme has to acknowledge gaps in the record. German documentation from the period was partially destroyed at the end of the war. British operational research did not exist in its modern form, so there was no systematic analysis of why certain attacks succeeded and others failed. The official histories, volume I of the British Official History by Brigadier C.J.E. Knox, remains the most comprehensive single source, but it was published in 1924 and reflects the perspective and limitations of its time. If you are looking for a single definitive explanation of what went wrong, you will not find one. The causes were multiple and interacting: intelligence failures, artillery defects, defensive design, training gaps, and the inherent difficulty of coordinating an infantry assault against a prepared enemy in 1916. No single factor was decisive on its own. Taken together, they produced the outcome that day. For further reading, the Imperial War Museum holds extensive collections of personal papers, maps, and artillery charts related to the Somme offensive. The National Archives at Kew hold the service files and war diaries of individual units. Both are freely accessible, though the material is voluminous and requires careful navigation.