September 1918
| Date | Events |
|---|---|
| Allied offensives continue in France; the Second Battles of the Somme and Arras officially end on 3 Sepetember | |
| 1 | British forces recapture Peronne |
| 2 | Offensive phase known as the Battle of the Drocourt-Queant Line begins; ends 3 September |
| 2 | Italian contingent joins Allied Expeditionary Force at Murmansk in North Russia |
| 3 | British force capture Lens |
| 3 | United States government recognises Czech-Slovak people as having a de facto government |
| 4 | Allied forces seize Oberseskaya in North Russia |
| 4 | United States contingent joins Allied Expeditionary Force at Murmansk in North Russia |
| 5 | Japanese forces capture Khabarovsk in eastern Siberia |
| 11 | Allied forces seize Ukhtinskaya in North Russia |
| 12 | United States forces in France begin offensive known as Battle of St Mihiel: their first large-scale operation |
| 12 | Offensive phase known as the Battle of the the Hindenburg Line (lasts to 9 October) begins with the Battle of Havrincourt |
| 14 | British begin to evacuate Baku on Caspian Sea |
| 15 | Allied offensive operations begin in Macedonia with the Battle of Dobropolje |
| 16 | German aeroplane raid on Paris - turns out to be the last of WW1 |
| 16 | Large explosion in Dover harbour as HMS "Glatton" blows up. Reports vary but at least 57 and possibly as many as 80 die on board |
| 18 | The continuing Battle of the the Hindenburg Line moves into next phase, the Battle of Epehy |
| 18 | Japanese forces capture Blagoveschensk in eastern Siberia |
| 18 | Allied offensive operations expand in Macedonia with the Battle of Monastir-Doiran: ends 24 September; Doiran is occupied on 22 September |
| 19 | In campaign in Palestine, Allied forces begin offensive operations in Battles of Megiddo (ends 25 September), Sharon and Nablus |
| 20 | British cavalry capture Nazareth and Beisan in Palestine |
| 23 | Haifa, Acre and Es Salt in Palsetine are all occupied by British forces |
| 23 | French forces capture Prilep in south Serbia |
| 23 | Turkish garrison abandons Ma'an on the Hejaz railway in Arabia |
| 25 | Serbian forces recapture Ishtip and Veles |
| 25 | British cavalry cut the Hejaz railway at Amman |
| 25 | Italian government recognises independent Yugoslav state |
| 26 | French, Italian and United States forces begin offensive operations in the Battles if the Champagne and Argonne |
| 27 | The continuing Battle of the the Hindenburg Line moves into next phase, the Battle of the Canal du Nord |
| 27 | Bulgarian government asks Allies for an Armistice |
| 28 | British and Belgian forces begin offensive operations in Flanders: they break out of the Ypres salient with relatively few casualties and war in Flanders becomes one of movement again. Messines is recaptured, and Passchendaele and Diksmuide on 29 september |
| 29 | The continuing Battle of the the Hindenburg Line moves into next phase, the Battle of the St Quentin Canal: one of the finest feats of arms as British forces cross canal at Riqueval |
| 29 | Turkish garrison of Ma'an surrenders near Amman |
| 29 | German force in East Africa recrosses River Rovuma and re-enters German territory |
| 30 | Bulgarians cease fighting and sign Armistice: hostilities cease at noon |
| 30 | Canadian contingent joins Allied Expeditionary Force at Archangel in North Russia |
| 30 | German Imperial Chancellor Count Hertling resigns |