Hawthorn Ridge Redoubt was a German field fortification, west of the village of Beaumont Hamel on the Somme. The redoubt was built after the end of the Battle of Albert (25–29 September 1914) and as French and later British attacks on the Western Front became more formidable, the Germans added fortifications and trench positions near the original lines around Hawthorn Ridge. At on 1 July 1916, the British fired a huge mine beneath Hawthorn Ridge Redoubt. Sprung ten minutes before zero hour, the mine was one of 19 mines detonated on the first day of the Battle of the Somme. Geoffrey Malins, one of two official war cameramen, filmed the detonation of the mine. The attack on the redoubt by part of the 29th Division of VIII Corps (Lieutenant-General Sir Aylmer Hunter-Weston) was a costly failure.
Hunter-Weston had ordered the mine to be fired early to protect the advancing infantry from falling debris but this also gave the Germans time to occupy the rear lip of the mine crater. When British parties advanced across no man's land to occupy the crater, they were engaged by German small-arms fire. A few British soldiers reached the objective but at noon they were ejected by a German counter-attack. The success of the German defence of the Hawthorn Ridge Redoubt crater contributed to the failure of the British attack on the rest of the VIII Corps front.
The British reopened the tunnel beneath the Hawthorn Ridge crater three days later and reloaded the mine with explosives for the Battle of the Ancre . The new mine was fired on 13 November in support of an attack on Beaumont-Hamel by the 51st (Highland) Division of V Corps. The Scottish infantry advanced from a trench from the German lines, half the distance of 1 July, with the support of tanks, an accurate creeping barrage and an overhead machine-gun barrage. Beaumont-Hamel was captured and prisoners taken.
Background
1914–1915
The 26th (Württemberg) Reserve Division Franz von Soden) of the XIV Reserve Corps, arrived on the Somme in late September 1914, attempting to advance westwards towards Amiens. By 7 October, the advance had ended and temporary scrapes had been occupied. Fighting in the area from the Somme north to the Ancre, subsided into minor line-straightening attacks by both sides. Underground warfare began on the Somme front, which continued when the British Expeditionary Force (BEF) took over from the French Second Army at the end of July 1915. Miners brought from Germany late in 1914 tunnelled under Beaumont-Hamel and the vicinity to excavate shelters in which infantry companies could shelter and against which even heavy artillery could cause little damage.
On the Somme front, a construction plan of January 1915, by which Falkenhayn intended to provide the western armies with a means to economise on infantry, had been completed. Barbed-wire obstacles had been enlarged from one belt wide to two belts wide and about apart. The front line had been increased from one trench to three, apart, the first trench () to be occupied by sentry groups, the second () to accommodate the front-trench garrison and the third trench for local reserves. The trenches were traversed and had sentry-posts in concrete recesses built into the parapet. Dugouts had been deepened from to , apart and large enough for An intermediate line of strong points (the ) about behind the front line had also been built. Communication trenches ran back to the reserve line, renamed the second line, which was as well built and wired as the first line. The second line was built beyond the range of Allied field artillery, to force an attacker to stop and move field artillery forward before assaulting the line.
1915–1916 On New Year's Eve 1915, a small mine was sprung under Redan Ridge north of Beaumont-Hamel, followed by German mine explosions on January. British mines were blown on January 1916 and both sides sprung mines in February; the Germans then dug a defensive gallery parallel to the front line to prevent surprises. On the night of a German raid by II Battalion, Reserve Infantry Regiment 119 (RIR 119) took place near Y Ravine, against the 2nd South Wales Borderers of the 29th Division and caused 112 casualties, for a loss of three killed and one man wounded. A big raid by the British on 30 April was seen by alert defenders and repulsed by small-arms fire and artillery as soon as it began. A report by the local German commander, showed that the preparations for the raid had been noticed a week before the attempt.
After the Second Battle of Champagne in 1915, construction of a third line another back from the had been begun in February 1916 and was nearly complete on the Somme front by 1 July. Divisional sectors north of the Albert–Bapaume road were about wide. German artillery was organised in a series of (barrage sectors). A telephone system was built with lines buried deep, for behind the front line, to connect the front line to the artillery. The Somme defences had two inherent weaknesses which the rebuilding had not remedied: The first was that the front trenches were on a forward slope, lined by white chalk from the subsoil and easily seen by ground observers. The second was that the defences were crowded towards the front trench, with a regiment having two battalions near the front-trench system and the reserve battalion divided between the and the second line, all within of the front line, accommodated in the new deep dugouts.
Prelude
German preparations
The headwaters of the Ancre river flow west to Hamel through the Ancre valley, past Miraumont, Grandcourt, Beaucourt and St. Pierre Divion. On the north bank, pointing south-east, lie the Auchonvillers spur, with a lower area known as Hawthorn Ridge, Beaucourt spur descending from Colincamps and Grandcourt spur crowned with the village of Serre. Shallow valleys link the spurs, the village of Beaumont-Hamel lies in the valley between Auchonvillers and Beaucourt spurs. A branch in the valley known as Y Ravine lies on the side of Hawthorn Ridge. In 1916, the front of VIII Corps lay opposite the line from Beaucourt to Serre, facing the series of ridges and valleys, beyond the German positions to the east. The German front line ran along the eastern slope of Auchonvillers spur, round the west end of Y Ravine to Hawthorn Ridge, across the valley of Beaumont-Hamel to the part of Beaucourt spur known as Redan Ridge, to the top of the Beaucourt valley to Serre. An intermediate line known to the British as Munich Trench began at Beaucourt Redoubt and ran north to Serre. The second position ran from Grandcourt to Puisieux and the third position was further back.
No man's land was about wide from the Ancre northwards and narrowed to about beyond the redoubt on Hawthorn Ridge. The ground was flat and unobstructed, except for a sunken road from the Auchonvillers–Beaumont-Hamel road and a low bank near the German front trench. The German front had several shallow salients, flanks, a bastion at the west end of Y Ravine and cover in the valleys to the east. Beaumont-Hamel commanded the valley, which the VIII Corps divisions were to cross and had been fortified. Beaucourt Ridge further back, gave a commanding view to German artillery observers, who could see the gun flashes of British field artillery, despite the guns being dug in. British observers could not see beyond the German support trenches and the convex slope on the British side of no man's land, making it difficult for heavy artillery to hit the front position, parts of which were untouched by the preliminary bombardment.
As signs of an Allied offensive increased during 1916, the lessons of the Second Battle of Artois and the Battle of Hébuterne in 1915, were incorporated into the defences of the Somme front. Observation posts were built in each defence sector, more barbed wire was laid and more telephone interception stations were installed, at the same time that more emphasis was laid on German telephone security. In early March and from the chief engineer of the 2nd Army inspected the first position in the area of the 26th Reserve Division; only in the area of RIR 119 at Beaumont-Hamel and the trenches to the west around Hawthorn Ridge Redoubt, were there enough shell-proof concrete posts. German infantry made a great effort to gather intelligence, patrol and raid the British lines to snatch prisoners; the British became more experienced in responding to local attacks and began to use the same tactics. In May, Soden wrote that at least of artillery ammunition were necessary, to ensure the success of a raid. On the night of a raiding party of RIR 119 failed to get forward when the German artillery fired short.
British preparations
Special arrangements were made by the 29th Division to capture Hawthorn Ridge Redoubt. Three tunnels were dug under no man's land by tunnellers of the Royal Engineers. The first tunnel was to be a communication link to the Sunken Lane (shown in the film The Battle of the Somme, released in August 1916). British units had just moved into the Sunken Lane and the tunnel constructed by 252nd Tunnelling Company served to link it with the old British front line. In the early hours of 1 July, the 1st Battalion, The Lancashire Fusiliers were to use it to reach the Sunken Lane, ready to attack Beaumont-Hamel. Two other tunnels, First Avenue and Mary, named after the communications trenches leading into them, were Russian saps dug to within of the German front line, ready to be opened at on 1 July, as emplacements for batteries of Stokes mortars.
The 252nd Tunnelling Company placed mine H3 north of First Avenue and Mary, beneath the German stronghold on the ridge. The miners had dug a gallery for about from the British lines about underground beneath Hawthorn Ridge Redoubt on the crest of the ridge and charged it with of Ammonal. The VIII Corps commander, Lieutenant-General Aylmer Hunter-Weston, wanted the mine to be sprung four hours before the offensive began so that the crater could be captured and consolidated in time for the alarm on the German side to have died down. On 15 June, the Fourth Army headquarters, ruled that all the mines on 1 July should be blown no later than eight minutes before zero; an unsatisfactory compromise was reached with Hunter-Weston to detonate the Hawthorn Redoubt mine ten minutes before zero hour.
An earlier detonation of the H3 mine in the VIII Corps sector was expected to divert German attention to the north bank of the Ancre, which would help the attacks of X Corps and XV Corps further south, where success was more important. Opinion in the 29th Division was that time was needed for the débris from the great mine to fall to earth, although it was demonstrated that all but dust had returned to the ground within twenty seconds. Firing the mine early conformed to the plan to occupy the crater quickly but it required the heavy artillery bombardment of the redoubt and adjacent trenches to lift during the assault. All of the VIII Corps heavy artillery was ordered to lift at and the field artillery to lift at A light shrapnel barrage fired by the divisional field artillery was to continue on the front trench until zero hour; in the 29th Division sector, half of the guns were to lift three minutes early.
British plan