The (18 June 1757) was the first major defeat for Frederick the Great , ending his aura of invincibility and forcing him to abandon his planned march on Vienna . Fought during the Seven Years' War , the battle saw approximately 54,000 Austrian troops under Marshal Leopold von Daun decisively defeat 34,000 Prussian soldiers. Strategic Context
Although Prussian cavalry initially drove back an Austrian counterattack, they were later crushed by fresh Austrian cavalry reserves. Kolin 1757: Frederick the Great's First Defeat
Prussia lost the strategic initiative; for much of the remaining war, Frederick was forced to react to the moves of the anti-Prussian coalition rather than dictating the conflict. The (18 June 1757) was the first major
