| Dates |
Events |
|
| August 8 – November 11
|
Hundred Days Offensive, last offensive on Western Front.
|
|
| August 13 – September 3
|
Battle of San Matteo.
|
|
| August 21 – September 3
|
Second Battle of the Somme (also known as the Third battle of the Somme), a phase of the Hundred Days Offensive.
|
Details
|
| August 21 – September 3
|
Second Battle of Bapaume, a phase of the Second Battle of the Somme.
|
|
| August 26 – September 3
|
Fourth Battle of Arras (also known as Second Battle of Arras (1918)), a phase of the Second Battle of the Somme
|
Details
|
| August 26 – September 14
|
Battle of Baku, last Turkish offensive of the war.
|
|
| August 31 – September 3
|
Battle of Mont Saint-Quentin, a phase of the Second Battle of the Somme.
|
|
| September 1–2
|
Battle of Peronne, a phase of the Battle of Mont Saint-Quentin.
|
Details
|
| September 2–3
|
Battle of Drocourt-Queant Line, final phase of the Second Battle of the Somme.
|
Details
|
| September 8-23
|
Ufa Conference: Formation of the Provisional All-Russian Government with the support of the Czechoslovak Legion.
|
|
| September 10
|
Battle of Savy-Dallon, a phase of the Hundred Days Offensive.
|
Details
|
| September 12
|
Battle of Havrincourt, a phase of the Hundred Days Offensive.
|
Details
|
| September 12–19
|
Battle of Saint-Mihiel, a phase of the Hundred Days Offensive.
|
|
| September 14
|
Battle of Vauxaillon, a phase of the Hundred Days Offensive.
|
Details
|
| September 14–29
|
Vardar Offensive, final offensive on the Balkan Front.
|
|
| September 15
|
The Allies (French and Serbs) break through the Bulgarian lines at Dobro Polje, a phase of the Vardar Offensive.
|
Details
|
| September 18
|
Battle of Epehy, a phase of the Hundred Days Offensive.
|
|
| September 18–19
|
Third Battle of Doiran, a phase of the Vardar Offensive, The Bulgarians halt the British and Greek advance.
|
Details
|
| September 18 – October 17
|
Battle of the Hindenburg Line, a phase of the Hundred Days Offensive. The Allies break through the German lines.
|
Details
|
| September 19–25
|
Battle of Megiddo. The British conquer Palestine.
|
Details
|
| Battle of Nablus, a phase of the Battle of Meggido.
|
Details
|
| Third Transjordan attack, a phase of the Battle of Nablus.
|
|
| Battle of Sharon, a phase of the Battle of Megiddo.
|
|
| September 22
|
The British capture Jisr ed Damieh in the Battle of Sharon.
|
Details
|
| September 25
|
The British capture Tiberias during the Battle of Sharon.
|
Details
|
| September 19
|
Battle of Tulkarm, a phase of the Battle of Sharon.
|
|
| Battle of Arara, a phase of the Battle of Sharon.
|
|
| September 19–20
|
Battle of Tabsor, a phase of the Battle of Sharon.
|
|
| September 20
|
Capture of Jenin, a phase of the Battle of Sharon.
|
|
| British capture both Afulah and Beisan during the Battle of Sharon.
|
Details
|
| September 20–21
|
Battle of Nazareth, a phase of the Battle of Sharon.
|
|
| September 23
|
Battle of Haifa, a phase of the Battle of Sharon.
|
Details
|
| September 25
|
Battle of Samakh, a phase of the Battle of Sharon.
|
|
| Second Battle of Amman, a phase of the Third Transjordan Attack.
|
|
| September 26 – November 11
|
Meuse-Argonne Offensive, the final phase of the Hundred Days Offensive and of World War I.
|
Details
|
| September 26 – October 1
|
The British enter Damascus.
|
Details
|
| September 26
|
Battle of Somme-Py (Initial phase of the Meuse-Argonne Offensive).
|
Details
|
| Charge at Irbid, a phase of the Capture of Damascus.
|
|
| September 26–27
|
British capture Deraa during the Capture of Damascus.
|
Details
|
| September 27
|
Battle of Jisr Benat Yakub, a phase of the Capture of Damascus.
|
|
| September 27 – October 1
|
Battle of the Canal du Nord, a phase of the Battle of the Hindenburg Line.
|
|
| September 28 – October 2
|
Fifth Battle of Ypres (also known as Advance on Flanders), a phase of the Battle of the Hindenburg Line.
|
|
| September 29 – October 10
|
Battle of St. Quentin Canal, a phase of the Hundred Days Offensive.
|
|
| September 30
|
Bulgaria signs an armistice with the Allies.
|
|
| Battle of Saint-Thierry (Initial phase of the Meuse-Argonne Offensive).
|
Details
|
| 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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