Battle of the Somme in the context of "Marc Bloch"

The Western Front was one of the main theatres of war during World War I. Following the outbreak of war in August 1914, the German Army opened the Western Front by invading Luxembourg and Belgium, then gaining military control of important industrial regions in France. The German advance was halted with the Battle of the Marne. Following the Race to the Sea, both sides dug in along a meandering line of fortified trenches, stretching from the North Sea to the Swiss frontier with France, the position of which changed little except during early 1917 and again in 1918.

Between 1915 and 1917 there were several offensives along this front. The attacks employed massive artillery bombardments and massed infantry advances. Entrenchments, machine gun emplacements, barbed wire, and artillery repeatedly inflicted severe casualties during attacks and counter-attacks and no significant advances were made. Among the most costly of these offensives were the Battle of Verdun, in 1916, with a combined 700,000 casualties, the Battle of the Somme, also in 1916, with over a million casualties, and the Battle of Passchendaele, in 1917, with 487,000 casualties.

The Hindenburg Line (Siegfriedstellung, Siegfried Position) was a German defensive fortification built during the winter of 1916–1917 on the Western Front in France during the First World War. The line ran from Arras to Laffaux, near Soissons, on the Aisne. In 1916, the Battle of Verdun and the Battle of the Somme left the German western armies (Westheer) exhausted and on the Eastern Front, the Brusilov offensive had inflicted huge losses on the Austro-Hungarian armies and forced the Germans to take over more of the front. The declaration of war by Romania had placed additional strain on the Imperial German Army and the war economy.

The Siegfriedstellung (Hindenburg Line) built behind the Noyon Salient, was to replace the old front line as a precaution against a resumption of the Battle of the Somme in 1917. By devastating the intervening ground, the Germans could delay an Anglo-French offensive. A shortened front could be held with fewer troops and with tactical dispersal, reverse-slope positions, defence in depth and camouflage, German infantry could be conserved. Unrestricted submarine warfare and strategic bombing would weaken the Anglo-French as the German armies in the west (Westheer) recuperated. On 25 January 1917, the Germans had 133 divisions on the Western Front but this was insufficient to contemplate an offensive.

The first day on the Somme (1 July 1916) was the beginning of the Battle of Albert (1–13 July) the name given by the British to the first two weeks of the Battle of the Somme (1 July–18 November) in the First World War. Nine corps of the French Sixth Army and the British Fourth and Third armies attacked the German 2nd Army (General Fritz von Below). The attack was from Foucaucourt south of the Somme, northwards across the Somme and the Ancre to Serre and Gommecourt, 2 mi (3.2 km) beyond, in the Third Army area. The objective of the attack was to capture the German first and second defensive positions from Serre south to the Albert–Bapaume road and the first position from the road south to Foucaucourt.

The German defence south of the road mostly collapsed and the French had complete success on both banks of the Somme, as did the British from Maricourt on the army boundary with the French northwards. XIII Corps took Montauban and reached all its objectives, XV Corps captured Mametz and isolated Fricourt. The III Corps attack on both sides of the Albert–Bapaume road was a disaster, making only a short advance south of La Boisselle, where the 34th Division suffered the most casualties of any Allied division on 1 July. Further north, X Corps captured part of the Leipzig Redoubt (an earthwork fortification), failed opposite Thiepval and had a great but temporary success on the left flank, where the German front line was overrun and Schwaben and Stuff redoubts captured by the 36th (Ulster) Division.

Joseph Jacques Césaire Joffre OM, GCB (French: [ʒozɛf ʒɔfʁ]; 12 January 1852 – 3 January 1931) was a French general who served as Commander-in-Chief of French forces on the Western Front from the start of World War I until the end of 1916. He is best known for regrouping the retreating allied armies to defeat the Germans at the strategically decisive First Battle of the Marne in September 1914.

His political position waned after unsuccessful offensives in 1915, the German attack on Verdun in 1916, and the disappointing results of the Anglo-French offensive on the Somme in 1916. At the end of 1916 he was promoted to Marshal of France, the first such elevation under the Third Republic, and moved to an advisory role, from which he quickly resigned. Later in the war he led an important mission to the United States.

The British Army during the First World War fought the largest and most costly war in its long history. Unlike the French and German Armies, the British Army was made up exclusively of volunteers, as opposed to conscripts, at the beginning of the conflict. Furthermore, the British Army was considerably smaller than its French and German counterparts. During the First World War, there were four distinct British armies. The first comprised approximately 247,000 soldiers of the regular army, over half of whom were posted overseas to garrison the British Empire, supported by some 210,000 reserves and a potential 60,000 additional reserves.

This component formed the backbone of the British Expeditionary Force (BEF), which was formed for service in France and became known as the Old Contemptibles. The second army was provided by the approximately 246,000-strong Territorial Force, initially allocated to home defence but used to reinforce the BEF after the regular army suffered heavy losses in the opening battles of the war. The third army was Kitchener's Army, which was composed of men who answered Lord Kitchener's call for volunteers in 1914–1915 and went into action at the Battle of the Somme in 1916. The fourth army was the reinforcement of existing formations with conscripts after the introduction of compulsory service in January 1916.

The Somme (French pronunciation: [sɔm] ; Picard: Sonme) is a department of France, located in the north of the country and named after the Somme river. It is part of the Hauts-de-France region. It is bordered by Pas-de-Calais and Nord to the north, Aisne to the east, Oise to the south and Seine-Maritime to the southwest. To the northwest, its coastline faces the English Channel and it shares maritime borders with Kent and East Sussex in the United Kingdom. It had a population of 570,559 in 2019.

The north central area of the Somme was the site of a series of battles during World War I, including the particularly significant Battle of the Somme in 1916. As a result of this and other battles fought in the area, the department is home to many military cemeteries and several major monuments commemorating the many soldiers from various countries who died on its battlefields. The 1346 Battle of Crécy, a major English victory early in the Hundred Years' War, also took place in this department.