On 3 September Lemberg was captured by the Russian army and the Battle of Rawa (Battle of Tarnavka 7–9 September) began in Galicia.
The First Battle of the Masurian Lakes (7–14 September) began and on 8 September the Austro-Hungarian army commenced the Second Invasion of Serbia, leading to the Battle of Drina (6 September – 4 October).
The Second Battle of Lemberg (8–11 September) began and on 11 September, Austrian forces in Galicia retreated.
The Battle of the Masurian Lakes ended on 15 September and Czernowitz in Bukovina was taken by the Russian army.
On 17 September Serbian forces in Syrmia were withdrawn and Semlin evacuated, as the Battle of the Drina ended.
Next day General Paul von Hindenburg was appointed Oberbefehlshaber der gesamten Deutschen Streitkräfte im Osten (Ober Ost, Commander-in-Chief of German Armies in the Eastern Theatre).
On 3 September Lemberg was captured by the Russian army and the Battle of Rawa (Battle of Tarnavka 7–9 September) began in Galicia. The First Battle of the Masurian Lakes (7–14 September) began and on 8 September the Austro-Hungarian army commenced the Second Invasion of Serbia, leading to the Battle of Drina (6 September – 4 October). The Second Battle of Lemberg (8–11 September) began and on 11 September, Austrian forces in Galicia retreated. The Battle of the Masurian Lakes ended on 15 September and Czernowitz in Bukovina was taken by the Russian army. On 17 September Serbian forces in Syrmia were withdrawn and Semlin evacuated, as the Battle of the Drina ended. Next day General Paul von Hindenburg was appointed Oberbefehlshaber der gesamten Deutschen Streitkräfte im Osten (Ober Ost, Commander-in-Chief of German Armies in the Eastern Theatre).
German invasion of Belgium