September 1914
| Date | Events |
|---|---|
| 1 | Secretary of State for War Lord Kitchener visits France to confer with Commander-in-Chief, FM Sir John French |
| 1 | First elements of Indian Expeditionary Force "C" land at Mombasa for operations in East Africa |
| 5 | British Expeditionary Force in France ceases to withdraw southward |
| 5 | French Sixth Army attacks enemy in area NW of Meaux (the Battle of the Ourcq, first phase of the Battle of the Marne) |
| 5 | German forces cross frontier into Northern Rhodesia |
| 6 | British Expeditionary Force begins to advance, joining French offensive in the Battle of the Marne |
| 9 | German forces begin to withdraw northward from the Marne |
| 9 | First elements of Indian Expeditionary Force "A" land at Suez en route for operations in France |
| 11 | Orders are issued in Britain for raising of Second New Army |
| 11 | Australian force lands in German New Guinea |
| 12 | The Battle of the Aisne begins |
| 13 | Orders are issued in Britain for raising of Third New Army |
| 17 | German New Guinea capitulates to Australian force |
| 19 | First elements of Indian Expeditionary Force "A" leave Egypt for Marseilles en route for operations in France |
| 19 | South African forces occupy Luederitzbucht in German South West Africa |
| 19 | British and French governments guarantee the integrity of Belgian colonies |
| 21 | German forces in New Guinea surrender to Australian force |
| 22 | HMS Aboukir, Hogue and Cressy all sunk by German submarine U-9 |
| 22 | German light cruiser "Emden" bombards Madras |
| 22 | First Britiah air raid on Germany as airship sheds at Cologne and Dusseldorf are bombed |
| 23 | British force at Tsingtao (Chian) joins with Japanese |
| 26 | First elements of Indian Expeditionary Force "A" land at Marseilles en route for operations in France |
| 27 | Germans begin siege of Antwerp in Belgium |