On June 16, 1815, he defeated the Prussians under Gebhard Leberecht von Blucher at Ligny, and sent 33,000 men, or about one-third of his total force, in pursuit of the retreating Prussians. On June 18, Napoleon led his remaining 72,000 troops against the Duke of Wellington’s 68,000-man allied army, which had taken up a strong position 12 miles south of Brussels near the village of Waterloo. In a fatal blunder, Napoleon waited until mid-day to give the command to attack in order to let the ground dry. The delay in fighting gave Blucher’s troops, who had eluded their pursuers, time to march to Waterloo and join the battle by the late afternoon. In repeated attacks, Napoleon failed to break the center of the allied center. Meanwhile, the Prussians