The last Russian attack of the war, the Kerensky Offensive, is defeated by the Central Powers.
The Russians launch the Brusilov Offensive against German and Austro-Hungarian forces on the Eastern Front.
The Second Battle of the Masurian Lakes, in East Prussia, ends in a Russian defeat to the Germans.
The Russians withdraw from East Prussia following defeat by Germany at the First Battle of the Masurian Lakes.
The Russians suffer a heavy defeat at German hands at Tannenberg in East Prussia.
A German attack at the Battle of Gumbinnen fails to stop the Russian advance in East Prussia. It also leads to reinforcements being transferred east from the Western Front, thus weakening the Schlieffen Plan’s chances of success.
The Russians invade East Prussia, but are temporarily checked by the Germans at the Battle of Stalluponen.