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German spring offensive

Coordinates: 50°00′10″N 02°39′10″E / 50.00278°N 2.65278°E / 50.00278; 2.65278
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German spring offensive
Part of the Western Front of World War I
Date21 March – 18 July 1918
Location50°00′10″N 02°39′10″E / 50.00278°N 2.65278°E / 50.00278; 2.65278
Result See Aftermath
German armies make gains along sections of the Western Front.
Commanders and leaders
German Empire Paul von Hindenburg[a]
German Empire Erich Ludendorff[b]
German Empire Crown Prince Wilhelm[c]
German Empire Max von Gallwitz[d]
German Empire Rupprecht of Bavaria[e]
German Empire Albrecht of Württemberg[f]
French Third Republic Ferdinand Foch[g]
French Third Republic Philippe Pétain[h]
French Third Republic Émile Fayolle[i]
French Third Republic Louis d'Esperey[j]
French Third Republic Paul Maistre[k]
French Third Republic Noël Castelnau[l]
United Kingdom of Great Britain and Ireland Douglas Haig[m]
Belgium King Albert I[n]
Casualties and losses
German Empire 688,341 casualties[1]
  • French Third Republic 433,000[2]
  • United Kingdom of Great Britain and Ireland 418,374[3]
  • First Portuguese Republic 7,000[4]
  • Kingdom of Italy 5,000[5]
  • Total: 863,374 casualties

The German spring offensive, also known as Kaiserschlacht ("Kaiser's Battle") or the Ludendorff offensive, was a series of German attacks along the Western Front during the First World War, beginning on 21 March 1918. Following American entry into the war in April 1917, the Germans decided that their only remaining chance of victory was to defeat the Allies before the United States could ship soldiers across the Atlantic and fully deploy its resources. The German Army had gained a temporary advantage in numbers as nearly 50 divisions had been freed by the Russian defeat and withdrawal from the war with the Treaty of Brest-Litovsk.

There were four German offensives, codenamed Michael, Georgette, Gneisenau, and Blücher-Yorck. Michael was the main attack, which was intended to break through the Allied lines, outflank the British forces (which held the front from the Somme River to the English Channel) and defeat the British Army. Once that was achieved, it was hoped that the French would seek armistice terms. The other offensives were subsidiary to Michael and were designed to divert Allied forces from the main offensive effort on the Somme. No clear objective was established before the start of the offensives and once the operations were underway, the targets of the attacks were constantly changed, depending on the tactical situation.

Once they began advancing, the Germans struggled to maintain the momentum, partly due to logistical issues. The fast-moving stormtrooper units could not carry enough food and ammunition to sustain themselves for long, and the army could not move in supplies and reinforcements fast enough to assist them. The Allies concentrated their main forces in the essential areas (the approaches to the Channel Ports and the rail junction of Amiens). Strategically worthless ground, which had been devastated by years of conflict, was left lightly defended. Within a few weeks, the danger of a German breakthrough had passed, though related fighting continued until July.

The German Army made the deepest advances either side had made on the Western Front since 1914. They re-took much ground that they had lost in 1916–17 and took some ground that they had not yet controlled. Despite these apparent successes, they suffered heavy casualties in return for land that was of little strategic value and hard to defend. The offensive failed to deliver a blow that could save Germany from defeat, which has led some historians[who?] to describe it as a Pyrrhic victory. In July 1918, the Allies regained their numerical advantage with the arrival of American troops. In August, they used this and improved tactics to launch a counteroffensive. The ensuing Hundred Days Offensive resulted in the Germans losing all of the ground that they had taken in the Spring Offensive, the collapse of the Hindenburg Line, and the capitulation of Germany that November.

German preparations



Comparative numbers of German and Allied front-line infantry from April to November 1918.[6]

The German High Command—in particular General Erich Ludendorff, the Chief Quartermaster General at Oberste Heeresleitung, the supreme army headquarters—has been criticised by military historians[who?] for the failure to formulate sound and clear strategy. Ludendorff privately conceded that Germany could no longer win a war of attrition, yet he was not ready to give up the German gains in the west and east and was one of the main obstacles to the German government's attempts to reach a settlement with the Western Allies.[7][page needed]

Although Ludendorff was unsure whether the Americans would enter the war in strength, at a meeting of the Chiefs of Staff of the German armies on the Western Front on 11 November 1917, he decided to launch an offensive.[8] The German government and Field Marshal Paul von Hindenburg, nominally the Chief of the General Staff, were not party to the planning process. Eventually it was decided to launch Operation Michael near Saint-Quentin, at the hinge between the French and British armies, and strike north to Arras. The main reason for the choice was tactical expediency. The ground on this sector of the front would dry out much sooner after the winter and spring rains and would therefore be easier to advance across. It was also a line of least resistance as the British and French armies were weak in the sector.[citation needed]

The intention was not to reach the English Channel coast, but to break through the Allied lines and roll up the flank of the British army from the south, pushing it back toward the Channel ports or destroying it if the British chose to stand and fight. Further operations such as Operation Georgette and Operation Mars were designed to strike further north to seize the remaining Allied ports in Belgium and France while diverting Allied forces from Michael. However, these remained only secondary and weaker operations, subordinate to Michael.[9]

The constant changing of operational targets once the offensive was underway gave the impression the German command had no coherent strategic goal. Any capture of an important strategic objective, such as the Channel ports, or the vital railway junction of Amiens, would have occurred more by chance than by design.[10][11][incomplete short citation]

Changes in tactics


The German army had concentrated many of its best troops into stormtrooper units, trained in infiltration tactics to infiltrate and bypass enemy front line units, leaving these strong points to be "mopped-up" by follow-up troops. The stormtrooper tactic was to attack and disrupt enemy headquarters, artillery units and supply depots in the rear areas, as well as to occupy territory rapidly.[12][incomplete short citation] Each major formation "creamed off" its best and fittest soldiers into storm units; several complete divisions were formed from these elite units. This process gave the German army an initial advantage in the attack, but meant that the best formations would suffer disproportionately heavy casualties, while the quality of the remaining formations declined as they were stripped of their best personnel to provide the stormtroops. The Germans also failed to arm their forces with a mobile exploitation force, such as cavalry, to exploit gains quickly. This tactical error meant the infantry had to keep up an exhausting tempo of advance.[13][incomplete short citation] Notwithstanding the effectiveness of the stormtroopers, the following German infantry often made attacks in large traditional waves and suffered heavy casualties.[14][incomplete short citation]

To enable the initial breakthrough, Lieutenant Colonel Georg Bruchmüller,[15] a German artillery officer, developed the Feuerwalze [de], (literally: rolling fire, rolling barrage)[16] an effective and economical creeping barrage scheme.[17] There were three phases: first, a brief bombardment on the enemy's command and communications (headquarters, telephone exchanges, etc.); then, destruction of their artillery; lastly an attack upon the enemy front-line infantry defences. Bombardment would always be brief so as to retain surprise. Bruchmüller's tactics were made possible by the vast numbers of heavy guns—with correspondingly plentiful amounts of ammunition for them—which Germany possessed by 1918[citation needed].

Allied preparations


Defensive tactics


In their turn, the Allies had developed defences in depth, reducing the proportion of troops in their front line and pulling reserves and supply dumps back beyond German artillery range. This change had been made after experience of the successful German use of defence in depth during 1917.[citation needed]

In theory, the front line was an "outpost zone" (later renamed the "forward zone"), lightly held by snipers, patrols and machine-gun posts only. Behind, out of range of German field artillery, was the "battle zone" where the offensive was to be firmly resisted, and behind that again, out of range of all but the heaviest German guns, was a "rear zone" where reserves were held ready to counter-attack or seal off penetrations. In theory, a British infantry division (with nine infantry battalions) deployed three battalions in the outpost zone, four battalions in the battle zone and two battalions in the rear zone.[18]

This change had not been completely implemented by the Allies. In particular, in the sector held by the British Fifth Army, which they had recently taken over from French units, the defences were incomplete and there were too few troops to hold the complete position in depth. The rear zone existed as outline markings only, and the battle zone consisted of battalion "redoubts" which were not mutually supporting (allowing stormtroopers to penetrate between them).[citation needed]

Operation Michael


On 21 March 1918, the Germans launched a large offensive against the British Fifth Army and the right wing of the British Third Army.

The artillery bombardment began at 4.40am on March 21. The bombardment [hit] targets over an area of 150 square miles [390 km2], the biggest barrage of the entire war. Over 1,100,000 shells were fired in five hours...[19]

German A7V tank at Roye, March 1918

The German armies involved were—from north to south—the Seventeenth Army under Otto von Below, the Second Army under Georg von der Marwitz and the Eighteenth Army under Oskar von Hutier, with a Corps (Gruppe Gayl) from the Seventh Army supporting Hutier's attack. Although the British had learned the approximate time and location of the offensive, the weight of the attack and of the preliminary bombardment was an unpleasant surprise. The Germans were also fortunate in that the morning of the attack was foggy, allowing the stormtroopers leading the attack to penetrate deep into the British positions undetected.[citation needed]

By the end of the first day, the British had lost 7,512 dead and 10,000 wounded and the Germans had broken through at several points on the front of the British Fifth Army. After two days the Fifth Army was in full retreat. As they fell back, many of the isolated "redoubts" were left to be surrounded and overwhelmed by the following German infantry. The right wing of Third Army became separated from the retreating Fifth Army, and also retreated to avoid being outflanked.[citation needed]

Ludendorff failed to follow the correct stormtrooper tactics, as described above. His lack of a coherent strategy to accompany the new tactics was expressed in a remark to Rupprecht, Crown Prince of Bavaria—commander of one of his Army Groups—in which he stated, "We chop a hole. The rest follows." Ludendorff's dilemma was that the most important parts of the Allied line were also the most strongly held. Much of the German advance was achieved where it was not strategically significant. Because of this, Ludendorff continually exhausted his forces by attacking strongly entrenched British units. At Arras on 28 March, he launched a hastily prepared attack (Operation Mars) against the left wing of the British Third Army, to try to widen the breach in the Allied lines. In this sector, the British defences in depth were complete and fully manned, some of the opening German bombardment hit only empty positions and there was no fog to give cover to the attacking stormtroopers. After a day, the Germans had achieved only minor gains and had suffered heavy casualties. Operation Mars was immediately cancelled.[20]

The German breakthrough had occurred just to the north of the boundary between the French and British armies. The French commander-in-chief, General Philippe Pétain, sent reinforcements to the sector too slowly in the opinion of the British commander-in-chief, Field Marshal Douglas Haig, and the British government, though the historian Elizabeth Greenhalgh disputes this, arguing that Petain sent the six additional divisions quicker than had been arranged with Haig – in 2 days instead of 4 – and arranging for extra divisions several times – 12 divisions on 23 March and 13 on the 25/26 March – before requests came in from Haig.[21] The Allies reacted by appointing the French General Ferdinand Foch to coordinate all Allied activity in France, and subsequently as commander-in-chief of all Allied forces everywhere.

The success of Operation Michael led German infantry to advance too far from its supply bases and railheads. The stormtrooper units leading the advance carried supplies for only a few days, to avoid being overburdened, and relied on supplies delivered quickly from the rear. The advance was slowed by supply shortages, which gave Allied commanders more time to reinforce the threatened areas and to slow the advance still more.[22] German supply difficulties were made worse by the direction of advance, which crossed the wasteland created during the Battle of the Somme in 1916 and by Operation Alberich, the German retirement to the Hindenburg Line from February to March 1917.[23]

Germans passing a captured British trench

After a few days, the German advance began to falter, as the infantry became exhausted and it became increasingly difficult to move artillery and supplies forward to support them. Fresh British and Australian units were moved to the vital rail centre of Amiens and the defence began to stiffen. After fruitless attempts to capture Amiens, Ludendorff called off Operation Michael on 5 April. By the standards of the time, there had been a substantial advance. It was, however, of little value; a Pyrrhic victory in terms of the casualties suffered by the crack troops, as the vital positions of Amiens and Arras remained in Allied hands. The newly-won territory would later be difficult to defend against Allied counter-attacks.[citation needed]

The Allies lost nearly 255,000 men (British, British Empire and French). They also lost 1,300 artillery pieces and 200 tanks.[24] All of this could be replaced, either from French and British factories or from American manpower. German troop losses were 239,000 men, many of them specialist shocktroops (Stoßtruppen) who were irreplaceable.[24] In terms of morale, the initial German jubilation at the successful opening of the offensive soon turned to disappointment, as it became clear that the attack had not achieved decisive results.


British Lewis gun team on the bank of the Lys canal during Battle of Hazebrouck, 15 April 1918
German prisoners being guarded by Australian troops, 23 April 1918.

Michael had drawn British forces to defend Amiens, leaving the rail route through Hazebrouck and the approaches to the Channel ports of Calais, Boulogne and Dunkirk vulnerable.[citation needed] German success here could choke the British into defeat.

The attack started on 9 April after a creeping barrage. The main attack was made on the open and flat sector defended by the Portuguese Expeditionary Corps. After an entire year spent in the trenches, the Portuguese were tired and had suffered heavy losses. They were being replaced in the front line by fresh British divisions, an operation that was planned to be completed on 9 April, the same day as the Germans attacked the sector. The process of relief in place was poorly organized by the British First Army's command, and the Portuguese 1st Division had been withdrawn to the rear on 6 April, leaving the Portuguese 2nd Division to defend the entire sector alone. They were left with an extensive 7 mi (11 km) front, without natural obstacles which might benefit the defence.[citation needed]

Hit hard by the bombardment and under the assault of eight German divisions, the Portuguese 2nd Division made a desperate defence, trying to hold their positions, which, however, were rapidly enveloped and overrun by the masses of German forces. The 2nd Division was virtually annihilated, losing more than 7,000 men. The British 40th Division, on the northern flank of the Portuguese, also rapidly collapsed before the attack, opening a gap that further facilitated the envelopment of the Portuguese by the Germans. However, under much less pressure from the Germans and occupying good defensive positions protected by the La Bassée Canal, the British 55th Division on the southern flank of the Portuguese were able to hold much of their position throughout the battle.[citation needed]

The next day, the Germans widened their attack to the north, forcing the defenders of Armentières to withdraw before they were surrounded, and capturing most of Messines Ridge. By the end of the day, the few British divisions in reserve were hard-pressed to hold a line along the River Lys.[citation needed]

Without French reinforcements, it was feared that the Germans could advance the remaining 15 mi (24 km) to the ports within a week. The commander of the British Expeditionary Force (BEF), Field Marshal Sir Douglas Haig, issued an "Order of the Day" on 11 April stating, "With our backs to the wall and believing in the justice of our cause, each one of us must fight on to the end."[citation needed]

However, the German offensive had stalled because of logistical problems and exposed flanks. Counterattacks by British, French and Anzac forces slowed and stopped the German advance. Ludendorff ended Georgette on 29 April.[citation needed]

As with Michael, losses were roughly equal, approximately 110,000 men wounded or killed, each.[25] Again, the strategic results were disappointing for the Germans. Hazebrouck remained in Allied hands and the Germans occupied a vulnerable salient under fire from three sides. The British abandoned the comparatively worthless territory they had captured at vast cost the previous year around Ypres, freeing several divisions to face the German attackers.[citation needed]


French and British troops marching back through Passy-sur-Marne, 29 May 1918.

While Georgette ground to a halt, a new attack on French positions was planned to draw forces further away from the Channel and allow renewed German progress in the north. The strategic objective remained to split the British and the French and gain victory before American forces could make their presence felt on the battlefield. The Americans were originally deployed in the quiet Saint-Mihiel sector in Lorraine where they had their first significant engagement in the defence of Seicheprey on 20 April. After the British had held off the Michael advance on the Somme, the US 1st Division was moved to reinforce the line in that sector in mid-April and launched their first attack of the war on Cantigny on 28 May 1918.[26]

The German attack took place on 27 May, between Soissons and Reims. The sector was partly held by four depleted British divisions which were "resting" after their exertions earlier in the year. In this sector, the defences had not been developed in depth, mainly due to the obstinacy of the commander of the French Sixth Army, General Denis Auguste Duchêne.[27] As a result, the German creeping barrage was very effective and the Allied front, with a few notable exceptions, collapsed. Duchêne's massing of his troops in the forward trenches also meant there were no local reserves to delay the Germans once the front had broken. Despite French and British resistance on the flanks, German troops advanced to the Marne River and Paris seemed a realistic objective. There was a frenzied atmosphere in Paris, which German long-range guns had been shelling since 21 March, with many citizens fleeing and the government drawing up plans to evacuate to Bordeaux.[28]

Yet again, losses were much the same on each side: 127,000 Allied and 130,000 German casualties up to 6 June.[29] German losses were again mainly from the difficult-to-replace assault divisions.



Although Ludendorff had intended Blücher-Yorck to be a prelude to a decisive offensive (Hagen) to defeat the British forces further north, he made the error of reinforcing merely tactical success by moving reserves from Flanders to the Aisne, whereas Foch and Haig did not overcommit reserves to the Aisne.[30] Ludendorff sought to extend Blücher-Yorck westward with Operation Gneisenau, intending to draw yet more Allied reserves south, widen the German salient and link with the German salient at Amiens.

The French had been warned of this attack (the Battle of Matz (French: Bataille du Matz)) by information from German prisoners, and their defence in depth reduced the impact of the artillery bombardment on 9 June. Nonetheless, the German advance (consisting of 21 divisions attacking over a 23 mi (37 km) front) along the Matz River was impressive, resulting in an advance of 9 miles (14 km) despite fierce French and American resistance. At Compiègne, a sudden French counter-attack on 11 June, by four divisions and 150 tanks (under General Charles Mangin) with no preliminary bombardment, caught the Germans by surprise and halted their advance. Gneisenau was called off the following day.[31]

Losses were approximately 35,000 Allied and 30,000 German.

Last German attack (Marneschutz-Reims/Friedensturm)


Ludendorff now postponed Hagen and launched the German Seventh, First and Third Armies in the Friedensturm (Peace Offensive) of 15 July, a renewed attempt to draw Allied reserves south from Flanders and to expand the salient created by Blücher–Yorck eastwards.[31] An attack east of Rheims was thwarted by the French defence in depth. In many sectors, the Germans, deprived of any surprise as their fuel-starved air force had lost air superiority to the Allies, advanced no further than the French Forward Zone, and nowhere did they break the French Battle (Second) Zone.[32]

Although German troops southwest of Rheims succeeded in crossing the River Marne, the French launched a major offensive of their own on the west side of the salient on 18 July, threatening to cut off the Germans in the salient. Ludendorff had to evacuate most of the Blücher–Yorck salient by 7 August and Hagen was finally cancelled.[33] The initiative had clearly passed to the Allies, who were shortly to begin the Hundred Days Offensive which ended the war.


The Kaiser on the way through a communication trench, 4 April 1918



The Kaiserschlacht offensives had yielded large territorial gains for the Germans, in First World War terms. However, victory was not achieved and the German armies were severely depleted, exhausted and in exposed positions. The territorial gains were in the form of salients which greatly increased the length of the line that would have to be defended when Allied reinforcements gave the Allies the initiative. In six months, the strength of the German army had fallen from 5.1 million fighting men to 4.2 million.[34] By July, the German superiority of numbers on the Western Front had sunk to 207 divisions to 203 Allied, a negligible lead which would be reversed as more American troops arrived.[31] German manpower was exhausted. The German High Command predicted they would need 200,000 men per month to make good the losses suffered. Returning convalescents could supply 70,000–80,000/month but there were only 300,000 recruits available from the next annual class of eighteen-year-olds.[35] Even worse, they lost most of their best-trained men: stormtrooper tactics had them leading the attacks. Even so, about a million German soldiers remained tied up in the east until the end of the war.

The Allies had been badly hurt but not broken. The lack of a unified high command was partly rectified by the appointment of General Foch to the supreme command, and coordination would improve in later Allied operations.[36] American troops were for the first time also used as independent formations.[37]

Ironically, the offensive's initial success may have hastened Germany's defeat by undermining morale. German leadership had hitherto told their soldiers that food and other supply shortages were comparable on both sides. By breaking into Allied lines, the German soldiers realized that the Allies were in fact much better fed and supplied than they were, and thus that their leaders had been lying to them.[38]

See also



  1. ^ Chief of the German Great General Staff
  2. ^ First Quartermaster General
  3. ^ Commander of Army Group German Crown Prince
  4. ^ Commander of Army Group Gallwitz
  5. ^ Commander of Army Group Rupprecht of Bavaria
  6. ^ Commander of Army Group Duke Albrecht
  7. ^ Allied Commander
  8. ^ Chief of Staff of the French Army
  9. ^ Commander of Army Group Reserve
  10. ^ Commander of Army Group North
  11. ^ Commander of Army Group Centre
  12. ^ Commander of Army Group East
  13. ^ Commander of BEF
  14. ^ Commander of Army Group Flanders


  1. ^ Churchill, "The World Crisis, Vol. 2", p.963. German casualties from "Reichsarchiv 1918"
  2. ^ Churchill, "The World Crisis, Vol. 2", p.963. French casualties from "Official Returns to the Chamber, March 29, 1922"
  3. ^ Churchill, "The World Crisis, Vol. 2", p.963. British casualties from "Military Effort of the British Empire"
  4. ^ Edmonds, Davies & Maxwell-Hyslop 1995, pp. 147–148, 168.
  5. ^ "Le souvenir de la 1ère GM en Champagne-Ardenne – Le cimetière italien de Bligny présenté par Jean-Pierre Husson". www.cndp.fr. Archived from the original on 10 May 2021. Retrieved 2 September 2018.
  6. ^ Leonard P. Ayers, The war with Germany: a statistical summary (1919) p 104 online
  7. ^ Martin Kitchen, The German Offensive of 1918 (2001)
  8. ^ Blaxland, p.25
  9. ^ Middlebrook 1983, pp. 30–34.
  10. ^ Brown 1998, p. 184.
  11. ^ Robson 2007, p. 93.
  12. ^ Simpson 1995, pp. 117–118.
  13. ^ Simpson 1995, p. 124.
  14. ^ Simpson 1995, p. 123.
  15. ^ Bruchmüller biography.
  16. ^ (Anon.) (1918) "Organization of a rolling barrage in the German Army", The Field Artillery Journal (U.S. Army), 8 : 417–421.
  17. ^ Zabecki, 2006, p 56
  18. ^ Blaxland, p.28
  19. ^ "Second battle of the Somme, 21 March-4 April 1918". www.historyofwar.org. Retrieved 2 September 2018.
  20. ^ Blaxland, pp.84-86
  21. ^ Greenhalgh 2004, pp. 771–820.
  22. ^ Brown 1998, p. 184
  23. ^ Middlebrook 1983, pp. 347–348.
  24. ^ a b Marix Evans, p.63
  25. ^ Marix Evans, p.81
  26. ^ Richard W. Stewart, ed. (2005). American Military History (PDF). Vol. II. Center of Military History, US Army. p. 30. Archived from the original (PDF) on 8 September 2020. Retrieved 2 June 2015.
  27. ^ Edmonds 1939, pp. 39–40.
  28. ^ Hart 2008, p.296
  29. ^ Marix Evans, p.105
  30. ^ Hart 2008, p. 294
  31. ^ a b c Hart 2008, p. 298
  32. ^ Hart 2008, p.299
  33. ^ Hart 2008, p.300
  34. ^ Edmonds 1939, p. 306.
  35. ^ Herwig 2014, p. 407.
  36. ^ Baldwin 1962, pp. 141–143
  37. ^ Marshall 1976, p. 57
  38. ^ "Collections: No Man's Land, Part I: The Trench Stalemate". 17 September 2021.




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Further reading

  • Pitt, Barrie (2013) [1962]. 1918: The Last Act. Pen & Sword Military Classics. Barnsley, UK: Pen & Sword Military. ISBN 9781783461721. OCLC 885305138.