The Russians are attacking in eastern Anatolia, hoping to capture the key city of Erzurum before Turkish reinforcements arrive from Gallipoli. Russia’s General Yudenich has launched diversionary attacks near the frontline city town of Köprüköy. These have tricked the Turks into sending most of the garrison away from the town.
Now Yudenich attacks Köprüköy itself. The Turks put up a stout resistance but as the fighting progresses their desperate position becomes more and more apparent: they are increasingly in danger of encirclement from their Russian enemies.
Fanciful depiction of the battle (Wikipedia)