| Dates |
Events |
|
| December 20, 1914 – March 17, 1915
|
First Battle of Champagne.
|
|
| January 28 – February 3
|
The Ottomans fail to capture the Suez Canal.
|
Details
|
| January 31
|
Battle of Bolimov. First German use of chemical weapons.
|
Details
|
| February 4
|
Germany begins unrestricted submarine warfare against merchant vessels.
|
Details
|
| February 7–22
|
Second Battle of the Masurian Lakes. The Russian X Army is defeated.
|
Details
|
| February 17–28
|
Ahead of the Gallipoli Campaign, HMS Ark Royal, with RNAS aircraft, commence air operations.
|
Details
|
| February 19
|
British and French naval attack on the Dardanelles. The Gallipoli Campaign begins.
|
Details
|
