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, led by Generals Paul von Hindenburg and Erich Ludendorff, faced off against the Russian Second Army commanded by General Alexander Samsonov. The battle resulted in a decisive German victory, with the Russians suffering heavy casualties and many soldiers taken prisoner. This battle is notable for its strategic planning and execution by the Germans, who effectively used railways for troop movement and communication. The defeat at Tannenberg severely weakened the Russian forces and boosted German morale, marking a turning point in the Eastern Front of the war.