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BATTLE // January 1, 1918

Battle of St. Quentin Canal

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Source · Wikipedia

Significance

The Battle of St Quentin Canal, beginning 29 September 1918, produced the first full breach of the Hindenburg Line—the heavily fortified Siegfriedstellung that German planners regarded as the backbone of their defensive position on the Western Front. The assault was conducted by British, Australian, and American forces under the Fourth Army, with the British Third Army supporting to the north and the French First Army attacking on a 9.5 km front to the south. Breaking through a sector where the St Quentin Canal itself formed part of the German defenses, the operation inflicted roughly 36,000 German casualties against approximately 8,800 Allied losses. Coming alongside concurrent Allied attacks across the length of the line during the Grand Offensive, the result persuaded the German high command that ultimate victory was no longer attainable, accelerating the collapse of German strategic confidence in the war's final weeks.

Tactics

The assault targeted a 19 km front held by the Fourth Army, with the St Quentin Canal integrated into the German defensive line. The attack was coordinated with a French First Army assault on a separate 9.5 km front to the south and British Third Army pressure to the north, applying simultaneous multi-sector pressure along the Hindenburg Line. Beyond these dispositions and the combined use of British, Australian, and American forces within the Fourth Army structure, the overview does not describe the specific tactical maneuvers employed.

Forces & casualties

Casualties

  • British Empire8,802
    medium
  • Germany36,000
    medium
Casualties in detail →

Commanders (5)

British Empire

Germany

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Last verified June 2026
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