The 20th (Light) Division was an infantry division of the British Army, part of Kitchener's Army, raised in the First World War. The division was formed in September 1914 as part of the K2 Army Group. The division landed in France July 1915 and spent the duration of the First World War in action on the Western Front. The division was disbanded after the end of the war in early 1919.

History 1914–15 Formation and training The 20th (Light) Division was authorised on 11 September 1914 and was to be composed of newly raised battalions from quick marching rifle and light infantry regiments.Inglefield p. 1 The 59th and 60th Brigades were concentrated at Blackdown with the Division Headquarters and other division troops. The 61st Brigade was concentrated at Aldershot, where the medical component also trained, the Artillery was formed near Deepcut, the engineers were trained at Chatham.Inglefield pp. 3–4 Clothing, in the form of emergency Kitchener Blue uniforms did not arrive until November, together with a few old rifles for drill practice, the artillery had only two 90 mm guns and two 15-pounders per brigade. The supply situation had improved by February 1915 when the Division moved to Whitley, by which time the 11th DLI, which had a large number of miners in it had become the Division pioneer battalion, trading places in the 61st Brigade with the 12th King's Regiment, the original divisional troops battalion.Inglefield pps. 3, 5 In April the Division marched to the Salisbury Plain Training Area to complete its training and were joined by the field ambulances after their training in June. the Division was inspected by the King at the end of that month, and embarked for France in the later part of July.Inglefield pp. 6–7

Arrival in France Leaving Amesbury on 20 July, by 26 July the division was concentrated in the Lumbres area east of Boulogne-sur-Mer. By 30 July the Division was part of III Corps of the First Army, and was billeted in the area between Hazebrouck and Armentières. Training now began in trench warfare, with officers and N.C.O.s being posted to the 8th and 27th Divisions, and bombing (grenades), machine gun and gas mask training for the other troops. The units of the division were rotated though the 8th and 27th Divisions in turn to experience trench warfare first hand between 2 and 17 August. The engineers and pioneers were employed at various tasks behind the lines.Inglefield pp. 7–9

At the end of August the division went into the front line in front of Levantie, south west of Armentiers, 59th and 60th Brigades in the line and the 61st in reserve. In this area the high water table meant that breastworks were required for defence.Inglefield pp. 11–12 During September mining and counter mining were carried out and snipers were trained in response to losses from German snipers. The 61st Brigade moved into the line on 5 September, relieving a brigade of the 8th Division. In the early hours of 13 September a mine was exploded by the Germans under a small salient held by 7th S.L.I. The crater was occupied by others from the battalion in spite of German shelling and mortaring, and 12 of the soldiers buried by the explosion were rescued alive. The first gallantry awards earned by men of the division were awarded for this action. These amounted to a Military Cross and a Distinguished Service Medal.Inglefield pp. 12–14

Loos

As part of a subsidiary action north of Loos, the 20th Division with the flanking Divisions (the Meerut Division to the south and the 8th to the north) were to launch a diversionary attack on the German lines, holding any lines gained. After four days of bombardment, with changes in the tempo of the shelling falsely indicating an imminent attack, and other demonstrations from the front line the attack was made on the morning of 25 September. Troops from the Indian Bareilly Brigade, and two battalions from the 60th Brigade (6th K.S.L.I. and 12th R.B.) managed to enter the German lines, but an attempt to drive a sap back towards the British lines was met with heavy enfilade fire and was halted. Unable to be supported the British were forced to retire around midday. The other two brigades made no advance that day but were still shelled in their trenches. Lieutenant George Allen Maling, an R.A.M.C. officer of the field ambulance attached to the 60th Brigade, received the Victoria Cross for treating men in the open under heavy shell fire all through the day.Inglefield pp. 15–22 The 60th Brigade had suffered 561 casualties in total, and next day the pioneers (11th D.L.I.) were attached to the Brigade as reinforcing infantry until 10 November, and the 68th Brigade from the 23rd Division was attached as division reserve.Sandilands p. 32-33Inglefield p. 23

The three brigades remained in the line, engaged in patrolling, mining, mortaring, sniping and demonstrating in order to prevent the Germans relieving parts of their line. The Division's mounted troops rotated through the trenches, and the cyclist company troops provided working parties.Inglefield p. 34 On 10 November the Indian Corps to the Division's right was relieved and replaced with XI Corps, this allowed the Division to shorten its line to two Brigades, the pioneers and the 68th Brigade returned to their normal roles.Inglefield p. 29 For the rest of the year the Division's artillery saw the most use, however a trench raid by parties from 10th R.B. and 11th K.R.R.C. was mounted on the night of 12–13 December. The 11th K.R.R.C. entered the German trenches, inflicting casualties, the 10th R.B. party had further to travel over no-mans land and faced an alerted enemy and were forced to withdraw.Inglefield pp. 31–33

1916 A gas attack, planned for the previous December, was finally launched with the arrival of favourable winds, as the Division began to leave the Levantie sector on 9 January 1916. Less than half of the cylinders intended were still in place and trench raids planned for that night were cancelled.Inglefield pp. 33–34 The final units of the division arrived in the reserve area on 13 January. After one weeks rest and training the Division was ordered to the Ypres Salient.Inglefield p. 35

Ypres

Arriving on 22 January in VI Corps reserve area, officers and N.C.O.s were sent to 14th Division, which the Division was to relieve, to become acquainted with the area. On 4 February VI Corps handed over to the newly formed XIV Corps (20th Division and the Guards Division).Inglefield p. 36 The Division was in the northern section of the salient, north of Ypres with its left on the canal. The area had been rendered a quagmire by shelling and the trench system was fragmented, shallow and poorly maintained, these remnants being separated by gaps of up to of mud.Inglefield p. 37 On the night of 11–12 February during the first placement of 60th Brigade into the line, the Germans attempted to interrupt the relief, but were thrown back after temporarily capturing one of the trench fragments. They were praised by Army and Corps commanders for their successful actions "...in novel conditions which might have placed them at a disadvantage," and by their own division and brigade commanders. Shortly after this isolated points were abandoned, one of which was from the German line and connected to it by a sap. The engineers and pioneers began the task of improving the trench system, the size of the task indicated by the fact that for a time of material per night were being moved from divisional workshops to the 96th Field Company R.E., attached to the 60th Brigade.Inglefield pp. 39–43 The difference in conditions in the salient can be seen in the casualty figures for the first month, of around 1,000 men killed, wounded or missing, equal to those of the whole five months while in the Laventie sector.

In early March the Division was strengthened by the arrival of three companies of machine gunners, one attached to each brigade.Inglefield p. 43 The Division was relieved by the 6th Division on 15 April, and went into GHQ and Corps reserve around Poperinghe, with the men of each brigade spending around a week on leave in Calais. During a month of rest and retraining, the artillery was reorganised and the mounted troops and cyclist company left the Division.Inglefield pp. 47–48 On 18 May the Division returned to the salient, relieving the Guards Division to the right of its previous position between Wieltje and Hooge, with the 6th Division on its left and the Canadian Corps on its right.Inglefield p. 48

Battle of Mont Sorrel

On 2 June the Germans launched an attack on the Canadians to the right of the Division. The right of the 60th Brigade received some of the German artillery barrage and two artillery pieces, placed near the Canadian front line to give enfilade fire along the Division's front, were lost with most of the crews. Units travelling up to the line were also shelled, including two companies of 12 K.R.R.C., sent to reinforce the Canadian left.Inglefield pp. 49–51 The 60th Brigade was targeted by German artillery on 6 June, however it was able to fire on German infantry moving up to attack the Canadians at Hooge, an infantry attack on the brigade later that day was repulsed, but a mine was exploded under the trenches of 12 R.B. at Gulley Farm killing 11 men.Inglefield pp. 51–52 Throughout the day the Division supported the Canadians with Trench mortar fire and the engineers assisted with the maintenance of communications. When the Canadians counter-attacked in the early hours of 13 June the Division launched gas, smoke and artillery attacks on the German lines, followed by patrols and trench raids which met with varied success.Inglefield pp. 53–54

The remainder of the Division's time at Ypres was spent patrolling and in trench raids. On 13 July 60th Brigade was placed under orders of II ANZAC Corps and transferred to the Armentieres sector, and supported an unsuccessful attack by the 61st (2nd South Midland) Division and the 5th Australian Division on 19 June. The remainder of the Division was relieved on 14 July. On 19 July the Division began to move back into the Line between Messines and Wytschaete, relieving the 24th Division. The Division Commander had been in command of the area for little more than an hour when verbal orders were received for a move south. The 60th Brigade rejoined the Division on 23 July, on 25–26 July the Division moved south leaving its artillery in the Ypres area.Inglefield pp. 54–60

The Somme

By 29 July the division was in the line on the north of the Somme battlefield, between Beaumont-Hamel and Hebuterne, having relieved the 38th (Welsh) Division except for its artillery which stayed to support the 20th. To the right of the division was the 25th Division, and to the left, the 56th (1st London) Division. The trenches in this area had been heavily shelled by the Germans in the first days of the battle, and the front could only be held with advance parties. The pioneers and engineers of the division dug new firing trenches and had to repair the communications trenches up to behind the front line. The division signal company was also employed repairing and replacing the buried telephone cables of the area, all the while under sporadic artillery and trench mortar fire. The 38th Division artillery was relieved by the Guards Division artillery on 7 August, and on 16 August the division was relieved by the Guards Division.Inglefield pp. 61–64

Battle of Guillemont