The Battle of Messines (7–14 June 1917) was an attack by the British Second Army (General Sir Herbert Plumer), on the Western Front, near the village of Messines (Dutch: Mesen) in West Flanders, Belgium, during the First World War. The Nivelle Offensive in April and May had failed to achieve its more grandiose aims, had led to the demoralisation of French troops and confounded the Anglo-French strategy for 1917.
The attack forced the Germans to move reserves to Flanders from the Arras and Aisne fronts, relieving pressure on the French. The British tactical objective was to capture the German defences on the ridge, which ran from Ploegsteert Wood (Plugstreet to the British) in the south, through Messines and Wytschaete to Mt Sorrel, depriving the German 4th Army of the high ground. The ridge gave commanding views of the British defences and back areas of Ypres to the north, from which the British intended to conduct the Northern Operation, an advance to Passchendaele Ridge and then the capture of the Belgian coast up to the Dutch frontier. The Second Army had five corps, three for the attack and two on the northern flank not part of the operation; XIV Corps was in General Headquarters reserve. The 4th Army divisions of Group Wytschaete (Gruppe Wijtschate, the IX Reserve Corps headquarters) held the ridge and were later reinforced by a division from Group Ypres (Gruppe Ypern).
The British attacked with the II Anzac Corps (3rd Australian Division, New Zealand Division and the 25th Division, with the 4th Australian Division in reserve), IX Corps (36th (Ulster), 16th (Irish) and 19th (Western) divisions and the 11th (Northern) Division in reserve) and X Corps (41st, 47th (1/2nd London) and 23rd Divisions with the 24th Division in reserve). XIV Corps was in reserve, with the Guards Division, 1st Division, 8th Division and the 32nd Division. The 30th, 55th (West Lancashire), 39th and 38th (Welsh) divisions, in II Corps and VIII Corps, guarded the northern flank and made probing attacks on 8 June. Gruppe Wijtschate held the ridge with the 204th, 35th, 2nd, 3rd Bavarian (relieving the 40th Division when the British attack began) and 4th Bavarian divisions, with the 7th Division and 1st Guard Reserve Division as Eingreif (counter-attack) divisions. The 24th Saxon Division, relieved on 5 June, was rushed back when the attack began and the 11th Division, in Gruppe Ypern reserve, arrived on 8 June.
The battle began with the detonation of nineteen mines beneath the German front position, which devastated it and left large craters. A 700 yd (640 m) deep creeping barrage began and protected the British troops as they secured the ridge with support from tanks, cavalry patrols and aircraft. The effect of the British mines, barrages and bombardments was improved by advances in artillery survey, flash spotting and centralised control of artillery from the Second Army headquarters. British attacks from 8 to 14 June advanced the front line beyond the former German Sehnenstellung (Chord Position, the Oosttaverne Line to the British). The battle was a prelude to the much larger Third Battle of Ypres, the preliminary bombardment for which began on 11 July 1917.
The Battle of Messines (7–14 June 1917) was an attack by the British Second Army (General Sir Herbert Plumer), on the Western Front, near the village of Messines (Dutch: Mesen) in West Flanders, Belgium, during the First World War. The Nivelle Offensive in April and May had failed to achieve its more grandiose aims, had led to the demoralisation of French troops and confounded the Anglo-French strategy for 1917.
The attack forced the Germans to move reserves to Flanders from the Arras and Aisne fronts, relieving pressure on the French. The British tactical objective was to capture the German defences on the ridge, which ran from Ploegsteert Wood (Plugstreet to the British) in the south, through Messines and Wytschaete to Mt Sorrel, depriving the German 4th Army of the high ground. The ridge gave commanding views of the British defences and back areas of Ypres to the north, from which the British intended to conduct the Northern Operation, an advance to Passchendaele Ridge and then the capture of the Belgian coast up to the Dutch frontier. The Second Army had five corps, three for the attack and two on the northern flank not part of the operation; XIV Corps was in General Headquarters reserve. The 4th Army divisions of Group Wytschaete (Gruppe Wijtschate, the IX Reserve Corps headquarters) held the ridge and were later reinforced by a division from Group Ypres (Gruppe Ypern).
The British attacked with the II Anzac Corps (3rd Australian Division, New Zealand Division and the 25th Division, with the 4th Australian Division in reserve), IX Corps (36th (Ulster), 16th (Irish) and 19th (Western) divisions and the 11th (Northern) Division in reserve) and X Corps (41st, 47th (1/2nd London) and 23rd Divisions with the 24th Division in reserve). XIV Corps was in reserve, with the Guards Division, 1st Division, 8th Division and the 32nd Division. The 30th, 55th (West Lancashire), 39th and 38th (Welsh) divisions, in II Corps and VIII Corps, guarded the northern flank and made probing attacks on 8 June. Gruppe Wijtschate held the ridge with the 204th, 35th, 2nd, 3rd Bavarian (relieving the 40th Division when the British attack began) and 4th Bavarian divisions, with the 7th Division and 1st Guard Reserve Division as Eingreif (counter-attack) divisions. The 24th Saxon Division, relieved on 5 June, was rushed back when the attack began and the 11th Division, in Gruppe Ypern reserve, arrived on 8 June.
The battle began with the detonation of nineteen mines beneath the German front position, which devastated it and left large craters. A 700 yd (640 m) deep creeping barrage began and protected the British troops as they secured the ridge with support from tanks, cavalry patrols and aircraft. The effect of the British mines, barrages and bombardments was improved by advances in artillery survey, flash spotting and centralised control of artillery from the Second Army headquarters. British attacks from 8 to 14 June advanced the front line beyond the former German Sehnenstellung (Chord Position, the Oosttaverne Line to the British). The battle was a prelude to the much larger Third Battle of Ypres, the preliminary bombardment for which began on 11 July 1917.
Background
British strategy 1916–1917
In 1916, the British planned to clear the Germans from the Belgian coast to deny them the use of the ports as naval bases. In January, Plumer recommended to Field Marshal Sir Douglas Haig the capture of Messines Ridge (part of the southern arc of the Ypres Salient) before an operation to capture the Gheluvelt plateau further north. The highest ground north of the Messines–Wytschaete ridge lies on the Menin road, between Hooge and Veldhoek, 1.5 mi (2.4 km) from Gheluvelt, at the west end of the main Ypres ridge, which runs from Ypres, east to Broodseinde and then north-east to Passchendaele, Westroosebeek and Staden. The British called it the Gheluvelt Plateau or Menin Ridge. Roads and tracks converged on the Menin road at this point (Clapham Junction to the British). The east end of the Gheluvelt plateau was on the west side of Polygon Wood. A flat spur either side of the Menin road ran about 3.5 mi (5.6 km) south-eastwards towards Kruiseecke and was about 1 mi (1.6 km) wide at Veldhoek, with a depression on the west side through which the Bassevillebeek flowed southwards and another on the east side, through which the Reutelbeek also flowed south. The spur widened to almost 2 mi (3.2 km) between Veldhoek and Gheluvelt.
A Flanders campaign was postponed because of the Battle of Verdun in 1916 and the demands of the Battle of the Somme. When it became apparent that the Second Battle of the Aisne (the main part of the Nivelle Offensive, 16 April to 9 May 1917) had failed to achieve its most ambitious objectives, Haig instructed the Second Army to capture the Messines–Wytschaete Ridge as soon as possible. British operations in Flanders would relieve pressure on the French Armies on the Aisne, where demoralisation amid the failure of the Nivelle Offensive had led to mutinies. The capture of Messines Ridge would give the British control of the tactically important ground on the southern flank of the Ypres Salient, shorten the front line and deprive the Germans of observation over British positions further north. The British would gain observation of the southern slope of Menin Ridge at the west end of the Gheluvelt plateau, ready for the Northern Operation.
Ypres salient
Ypres is overlooked by Kemmel Hill in the south-west and from the east by a line of low hills running south-west to north-east. Wytschaete (Wijtschate) and Hill 60 are to the east of Verbrandenmolen, Hooge, Polygon Wood and Passchendaele (Passendale). The high point of the ridge is at Wytschaete, 7,000 yd (4.0 mi; 6.4 km) from Ypres, while at Hollebeke the ridge is 4,000 yd (2.3 mi; 3.7 km) distant and recedes to 7,000 yd (4.0 mi; 6.4 km) at Polygon Wood. Wytschaete is about 150 ft (46 m) above the plain; on the Ypres–Menin road at Hooge, the elevation is about 100 ft (30 m) and 70 ft (21 m) at Passchendaele. The rises are slight, apart from the vicinity of Zonnebeke, which has a gradient of 1:33. From Hooge and further east, the slope is 1:60 and near Hollebeke, it is 1:75; the heights are subtle and resemble a saucer lip around the city.
The main ridge has spurs sloping east and one is particularly noticeable at Wytschaete, which runs 2 mi (3.2 km) south-east to Messines (Mesen) with a gentle slope on the east side and a 1:10 decline westwards. Further south, is the muddy valley of the River Douve, Ploegsteert Wood (Plugstreet to the British) and Hill 63. West of Messines Ridge is the parallel Wulverghem (Spanbroekmolen) Spur and on the east side, the Oosttaverne Spur, which is also parallel to the main ridge. The general aspect south and east of Ypres, is one of low ridges and dips, gradually flattening northwards beyond Passchendaele, into a featureless plain.
Possession of the higher ground to the south and east of Ypres, gave the German 4th Army army ample scope for ground observation, enfilade fire and converging artillery bombardments. Occupation of the higher ground had the advantage that artillery deployments and the movement of reinforcements, supplies and stores could be screened from view. The ridge had woods from Wytschaete to Zonnebeke giving good cover, some being of notable size, like Polygon Wood and those later named Battle Wood, Shrewsbury Forest and Sanctuary Wood. In 1914, the woods usually had undergrowth but by 1917, artillery bombardments had reduced the woods to tree stumps, shattered tree trunks tangled with barbed wire and more wire festooning the ground, which was full of shell-holes; fields in the gaps between the woods were 800–1,000 yd (730–910 m) wide and devoid of cover. The main road to Ypres from Poperinge to Vlamertinge is in a defile, easily observed from the ridge. Roads in the area were unpaved, except for the main ones from Ypres, with occasional villages and houses dotted along them. The lowland west of the ridge was a mixture of meadows and fields, with high hedgerows dotted with trees, cut by streams and a network of drainage ditches emptying into canals.
Topography
In Flanders, sands, gravels and marls predominate, covered by silts in places. The coastal strip is sandy but a short way into the hinterland, the ground rises towards the Vale of Ypres, which before 1914 was a flourishing market garden. Ypres is 66 ft (20 m) above sea level; Bixschoote 4 mi (6.4 km) to the north is at 28 ft (8.5 m). To the east the land is at 66–82 ft (20–25 m) for several miles, with the Steenbeek river at 49 ft (15 m) near St Julien. There is a low ridge from Messines, 260 ft (80 m) at its highest point, running north-east past Clapham Junction at the west end of Gheluvelt plateau (2+1⁄2 miles from Ypres at 213 ft (65 m) and Gheluvelt, above 160 ft (50 m) to Passchendaele, (5+1⁄2 miles from Ypres at 160 ft (50 m) declining from there to a plain further north. Gradients vary from negligible, to 1:60 at Hooge and 1:33 at Zonnebeke. Underneath the soil is London clay, sand and silt; according to the Commonwealth War Graves Commission categories of sand, sandy soils and well-balanced soils, Messines ridge is well-balanced soil and the ground around Ypres is sandy soil. The ground is drained by many streams, canals and ditches, which need regular maintenance. Since the First Battle of Ypres in 1914, much of the drainage had been destroyed, though some parts were restored by land drainage companies from England. The area was considered by the British to be drier than Loos, Givenchy-lès-la-Bassée (Givenchy) and Plugstreet (Ploegsteert) Wood further south.
Prelude
British preparations
The Second Army centralised its artillery and devised a plan of great sophistication, following the precedent set at the Battle of Arras in April. The use of field survey, gun calibration, weather data and a new and highly accurate 1:10,000 scale map, much improved artillery accuracy. Systematic target-finding was established by the use of new sound-ranging equipment, better organisation of flash-spotting and the communication of results through the Army Report Centre at Locre Château. Counter-battery artillery bombardments increased from twelve in the week ending 19 April, to 438 in the last ten days before the attack. A survey of captured ground after the battle found that 90 per cent of the German artillery positions had been plotted. The 2nd Field Survey Company also assisted mining companies by establishing the positions of objectives within the German lines, using intersection and a special series of aerial photographs. The company surveyed advanced artillery positions for guns to be moved forward to them and open fire as soon as they arrived.
The British had begun a mining offensive against the Wijtschatebogen (Wytschaete position) in 1916. Sub-surface conditions were especially complex and separate ground water tables made mining difficult. Two military geologists assisted the miners from March 1916, including Edgeworth David, who planned the system of mines. Sappers dug the tunnels into a layer of blue clay 80–120 ft (24–37 m) underground, then drifted galleries for 5,964 yd (3.389 mi; 5.453 km) to points deep underneath the front position of Gruppe Wijtschate, despite German counter-mining. German tunnellers came close to several British mine chambers, found the mine at La Petite Douve Farm and wrecked the chamber with a camouflet. The British diverted the attention of German miners from their deepest galleries by making many secondary attacks in the upper levels. Co-ordinated by tunnelling companies of the Royal Engineers, Canadian, Australian, New Zealand and British miners laid 26 mines with 447 long tons (454 t) of ammonal explosive.
Two mines were laid at Hill 60 on the northern flank, one at St Eloi, three at Hollandscheschuur, two at Petit Bois, one each at Maedelstede Farm, Peckham House and Spanbroekmolen, four at Kruisstraat, one at Ontario Farm and two each at trenches 127 and 122 on the southern flank. One of the largest of the mines was at Spanbroekmolen; Lone Tree Crater formed by the blast of 91,000 lb (41,277 kg) of ammonal in a chamber at the end of a gallery 1,710 ft (0.324 mi) long, 88 ft (27 m) below ground was 250 ft (76 m) in diameter and 40 ft (12 m) deep. The British knew of the importance the Germans placed on holding the Wijtschate salient, after a captured corps order from Gruppe Wijtschate stating "that the salient be held at all costs" was received by Haig on 1 June. In the week before the attack, 2,230 guns and howitzers bombarded the German trenches, cut wire, destroyed strongpoints and conducted counter-battery fire against 630 German artillery pieces, using 3,561,530 shells. The 4th Army artillery consisted of 236 field guns, 108 field howitzers, fifty-four 100–130 mm guns, twenty-four 150 mm guns, 174 medium howitzers, 40 heavy howitzers and four heavy 210 mm and 240 mm guns.
In May, the 4th Australian Division, 11th (Northern) Division and the 24th Division were transferred from Arras as reserve divisions for the Second Army corps in the attack on Messines Ridge. Seventy-two of the new Mark IV tanks also arrived in May and were hidden south-west of Ypres. British aircraft began to move north from the Arras front, the total rising to about 300 operational aircraft in the II Brigade RFC (Second Army) area. The mass of artillery to be used in the attack was supported by many artillery-observation and photographic reconnaissance aircraft, in the corps squadrons which had been increased from twelve to eighteen aircraft each. Strict enforcement of wireless procedure allowed a reduction of the minimum distance between observation aircraft from 1,000 yd (910 m) at Arras in April to 400 yd (370 m) at Messines, without mutual wireless interference. Wire-cutting bombardments began on 21 May and two days were added to the bombardment for more counter-battery fire. The main bombardment began on 31 May, with only one day of poor weather before the attack. Two flights of each observation squadron concentrated on counter-battery observation and one became a bombardment flight, working with particular artillery bombardment groups for wire cutting and trench-destruction; these flights were to become contact-patrols to observe the positions of British troops once the assault began. The attack barrage was rehearsed on 3 June to allow British air observers to plot masked German batteries, which mainly remained hidden but many minor flaws in the British barrage were reported. A repeat performance on 5 June, induced a larger number of hidden German batteries to reveal themselves.