| Dates |
Events |
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| September 18 – October 17
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Battle of the Hindenburg Line, a phase of the Hundred Days Offensive. The Allies break through the German lines.
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Details
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| September 26 – November 11
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Meuse-Argonne Offensive, the final phase of the Hundred Days Offensive and of World War I.
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Details
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| September 26 – October 1
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The British enter Damascus.
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Details
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| September 27 – October 1
|
Battle of the Canal du Nord, a phase of the Battle of the Hindenburg Line.
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| September 28 – October 2
|
Fifth Battle of Ypres (also known as Advance on Flanders), a phase of the Battle of the Hindenburg Line.
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| September 29 – October 10
|
Battle of St. Quentin Canal, a phase of the Hundred Days Offensive.
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| September 30
|
Bulgaria signs an armistice with the Allies.
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| Battle of Saint-Thierry (Initial phase of the Meuse-Argonne Offensive).
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Details
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| Charge at Kaukab, a phase of the Capture of Damascus.
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| Charge at Kiswe, a phase of the Capture of Damascus.
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| October 3
|
Tsar Ferdinand I of Bulgaria abdicates and Boris III accedes to the throne.
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| October 3–27
|
Pursuit to Haritan.
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| Battle of Blanc Mont Ridge.
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| October 8–10
|
Second Battle of Cambrai (also known as Battle of Cambrai (1918)), a phase of the Battle of the Hindenburg Line.
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Details
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| October 14–17
|
Battle of Montfaucon (intermediate phase of the Meuse-Argonne Offensive).
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Details
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| October 14–19
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Battle of Courtrai, closing phase of the Hundred Days offensive.
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Details
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| October 15
|
Battle of Mont-D'Origny, a phase of the Hundred Days Offensive.
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Details
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| October 17–26
|
Battle of the Selle, closing phase of the Hundred Days Offensive.
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| October 20
|
Germany suspends submarine warfare.
|
Details
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| Battle of Lys and Escaut (Which included the Second Battle of Lys and the Battle of the Escaut), a phase of the Hundred Days Offensive.
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Details
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| Battle of Serre, a phase of the Hundred Days Offensive.
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Details
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| October 23–30
|
Battle of Sharqat.
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| October 24 – November 4
|
Battle of Vittorio Veneto. The Austro-Hungarian army is routed. The Italians enter Trent and land at Triest.
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Details
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| October 24–28
|
Second Battle of Monte Grappa, beginning phase of Vittorio Veneto.
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| October 25
|
Battle of Aleppo.
|
Details
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| October 29
|
Wilhelm Groener replaces Erich Ludendorff as Hindenburg's deputy.
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Details
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| Germany's Hochseeflotte mutinies.
|
Details
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| State of Slovenes, Croats and Serbs proclaimed.
|
Details
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| October 30
|
The Ottoman Empire signs the Armistice of Mudros.
|
Details
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