Orders of battle for the German attack on Vimy Ridge

The German attack on Vimy Ridge (/Operation Schleswig-Holstein) was a local German attack on Vimy Ridge. The attack took place on 21 May 1916 on the Western Front during the First World War. At the Third Battle of Artois (25 September – 4 November 1915) the French Tenth Army captured positions on the western slope of Vimy Ridge and the German 6th Army was forced back to positions on the steeper eastern slope. Both sides resorted to a continuous underground offensive. The Tenth Army was transferred south in March 1916, during the Battle of Verdun (21 February – 18 December 1916) and the British First Army and Third Army on either flank extended their lines to take over Vimy Ridge.
 was intended to capture British positions, from which the French mining offensive had been continued, to gain more defensive depth and to forestall mine attacks on the German positions. The British divisions were still organising their defences on the ridge, having recently relieved the French when the German attack began. The attack was a success and raised concerns that it was a prelude to a more ambitious attempt to capture Arras. Plans were made for a British counter-attack but it was cancelled, to avoid a diversion of effort from the forthcoming offensive on the Somme, in favour of the Attack on the Gommecourt Salient; plans laid in the meantime formed the basis for the attack of the Canadian Corps in April 1917.
Orders of battle.
German.
The attack front was divided into three sectors, South with Foot Guard Regiment 5 (4th Guard Division), Centre with Reserve Infantry Regiment 86 of the 18th Reserve Division and North with Infantry Regiment 163 from the 17th Reserve Division, all three sector regiments being reinforced by machine-gun and engineer units; two more infantry regiments were held in reserve. Eighty artillery batteries, including the artillery of the IX Reserve Corps, IV Corps and the Guard Reserve Corps, plus six batteries of heavy howitzers and nine mortar batteries, along with six heavy, nine medium and eight light "Minenwerfer" were to participate. Sufficient ammunition was provided for batteries to fire at a rate of 200 shells per hour and counter-battery reconnaissance aircrews managed to locate 83 British artillery emplacements.
Northern Sector (Data taken from Rogers "The German Attack at Vimy Ridge" [2010] unless indicated.
Central Sector
18th Reserve Division
Right flank
Left flank
Southern Sector
British.
In early 1916, the Berthonval and Carency sectors were transferred to the First Army, IV Corps (Lieutenant-General Henry Wilson) from the Third Army, XVII Corps (Lieutenant-General Sir Julian Byng) and from the 25th Division to the 47th (1/2nd London) Division, which extended its right flank southwards to P sector. Neither side controlled the crest and to the south of the Berthonval sector, the British intended to treat the front line as the main line of resistance to protect Zouave Valley, which rose southwards from the valley of the Souchez river, about back from the front line. German gunners continually bombarded the "Talus de Zouaves" (Zouave embankment) in Zouave Valley, which could cut off British contact with the front line. When the 47th Division moved its right flank to the south, Central Ave became the army boundary instead of Ersatz Ave; during a reshuffle on the night of the northern defences were taken over by the 23rd Division; the 140th Brigade took over Berthonval from the 74th Brigade, 25th Division and the 141st Brigade took over Carency from the 142nd Brigade, which went into divisional reserve. The 7th Brigade, 25th Division in P sector came temporarily under the command of the 47th Division.
25th Division Data from Rogers "The German Attack at Vimy Ridge" [2010] unless indicated.
Berthonval sector
Central Avenue – Ersatz Alley sectors
Carency sector
Reinforcements