The battle of Vistula River in 1914.

The Battle of the Vistula River began on August 23, 1914, and lasted until September 2, 1914. It took place along the Vistula River, primarily in the region of East Prussia, which was then part of Germany. The battle was part of the larger German offensive known as the Gorlice-Tarnów Offensive, which aimed to break through the Russian lines and advance into Russian.

The German forces, led by Generals Paul von Hindenburg and Erich Ludendorff, launched a series of coordinated attacks against the Russian armies along the Vistula River. They aimed to push the Russians back and secure the eastern frontier of Germany. The Germans managed to encircle and trap the Russian Second Army near the town of Königsberg (now Kaliningrad). This resulted in the destruction of the Russian Second Army, with a significant number of casualties and prisoners of war.

This battle was a decisive victory for the Central Powers. It weakened the Russian military presence in East Prussia and disrupted their plans for an offensive against Germany. The battle also marked the beginning of a series of German successes on the Eastern Front during World War I.