The Battle of Tannenberg was a significant military engagement during World War I, fought between August 26 and August 30, 1914. It took place in East Prussia, where the German Army faced off against the Russian Army. The battle resulted in a decisive victory for the Germans, who effectively encircled and defeated the Russian forces, leading to heavy casualties and the capture of thousands of Russian soldiers. This battle is often noted for the strategic brilliance of German commanders, particularly Paul von Hindenburg and Erich Ludendorff. Their successful tactics not only boosted German morale but also marked a turning point in the Eastern Front of the war, establishing German dominance in the region.