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| Erich Ludendorrf in 1918 Kept tight command over his masterplan |
Following the exertions and traumas of the
Western Front in 1917, the Allied and German Armies were all close to
exhaustion. The Germans were, however, in better shape for two main reasons.
Firstly, through fighting defensively their casualties were a little more than
half of the French and British combined figure of an estimated 1.5 million.
Secondly, they were able to bring fresh (but war hardened) reinforcements from
the Eastern Front (see Posts 10/12/2017 and 22/1/2018).
Ludendorff’s grand plan was for an all or
nothing offensive and breakthrough, using his new predominance of numbers, to
knock the British and French Armies out of the war in four months, before a
significant force of Americans could arrive in France.
For calculated political reasons,
Ludendorff chose to name the campaign Kaiserschlacht
– the Kaiser’s Battle. Although he had also convinced the Reichstag with his plans,
he preferred to use the monarchy to be nominal head of the military rule that
he and Hindenburg were now exercising.
He kept Royals as head of the two army groups given responsibility for the
breakthrough – Prince Rupprecht of Bavaria to the north and Crown Prince
Wilhelm (See post 5/2/2016) to the south.
At the end of October 1917 the Allied
armies on the Western Front outnumbered the German defenders by 186 Divisions
to 150, and 95% of those Division were British or French. By March 1918 the
position was reversed – 169 Allied Divisions faced 192 German*. Not only had the
Germans brought reinforcements from the Eastern Front, but the British and
French had lost Divisions transferred to Italy and the Middle East. Some
Divisions had too many losses to continue and their survivors were transferred
to bolster other weakened Divisions. Qualitatively the British were facing
fresher and more experienced opponents. Of those involved in the Kaisershlacht only 9 British Divisions
had not been involved in the exhausting Third Ypres battle, whereas 68 German
Divisions had not **. Ludendorff’s plan details were kept secret until as late as
possible, but involved attacking in strength along a broad front of more than sixty
miles, seeking for weak points that could be exploited with rapid advances by
storm-troopers – as had happened at Caporetto (see Post 13/11/2017). No problem
for him that the Allies suspected a major onslaught, provided they did not
guess its location - anywhere between Belgium in the north or Belfort at the southern limits
of the Western Front. In fact he had already made his decision that the main
strike would be in the Somme area, where he saw the junction between French and
British commands. His plan was to drive a wedge between British and French,
such that he could push the British towards the Channel ports, where they would
have to surrender or withdraw. The
French armies would be blocked from supporting the British and, in turn, would
fall back on Paris and be overwhelmed. His plan had something of the Schlieffen
about it (see Post 13/11/2014) – the British, hemmed into the Pas de Calais
would be the equivalent to Russia in Schlieffen’s original.
By the end of the German counter-attacks in
December 1917, Haig had come to expect that the Western Front tables would be
turned in 1918, and that he would have to wage defensive war for the first time
since 1914. Petain also realised this, and their joint planning took on an
urgency to improve defences along the front. Petain was still pre-occupied with
the fragility of his positions at the Aisne, in Champagne and around Verdun. He
persuaded a reluctant Haig that the British should take over more of the line.
It was a fateful decision. In early January 1918, the right hand (southern) limit of the
British sector had been held by Byng’s 3rd Army just south of Arras,
including its residual gains in the Flesquières salient from the Cambrai action. By the end
of the month the British line had extended south by a further forty miles –
south of St. Quentin and down to Barisis on the River Oise. Charged with
holding this new sector was Gough’s 5th Army, transferred from
Ypres, and it was a big ask. While Byng’s army would be holding the sector
immediately to the north, roughly from Arras to Cambrai, Gough was being asked
to hold the new sector south from Cambrai to Barisis. Byng had 14 Divisions to
hold 28 miles of front; Gough had 12 Divisions and 3 Cavalry Divisions to hold
42 miles. This total of 29 Divisions was ranged against 76 German Divisions.
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| Prince Rupprecht. Commanded two of the 3 Kaiserschlacht armies |
The upshot of all this was that
Ludendorff’s first great hammer blow was now destined to fall entirely on the
British 3rd and 5th Armies rather than at the junction of
French and British commands. But the junction between Gough and Byng was to
prove as unstable as any British French line.
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| Crown Prince Wilhelm Nominally in command of one Kaiserschlacht army |
Above all the 3rd and
5th armies (supported by other small armies of pioneers, Chinese
labourers and forced labour PoWs) had rapidly to construct more complex defences
to withstand new German tactics. The 3rd Army had been in position
for more than a year, and knew their conditions well. Poor Gough’s army had
just arrived from the horrors of Passchendaele, and they inherited French
trenches that were barely adequate for attacking, let alone defending. At least
they found the ground dry, but various ingredients were adding up to a perfect storm.
*And British
Divisions had shrunk to an establishment of 10 Battalions rather than 13
because of the continuing heavy losses.
** Martin
Middlebrook The Kaiser’s Battle p43
