in a tactical draw. The next day the Allies ceded the field at Quatre Bras to consolidate their forces on more favourable ground to the north along the road to Brussels as a prelude to the Battle of Waterloo. Ligny Napoleon, meanwhile, used the right wing of his army and the reserve to defeat the Prussians, under the command of General Blücher, at the Battle of Ligny on the same day. The Prussian centre gave way under heavy French attack but the flanks held their ground. Several heavy Prussian cavalry charges proved enough to discourage French pursuit. Indeed, they would not pursue the Prussians until the morning of 18 June. D'Erlon's I Corps wandered between both battles contributing to neither Quatre Bras nor to Ligny. Napoleon wrote to Ney warning him that allowing D'Erlon to wander so far away had crippled his attacks on Quatre Bras. However, he made no move to recall D'Erlon when he could easily have done so. The tone of his orders shows that he believed he had things well in hand at Ligny without assistance (as in fact he had). Interlude (17 June) After the fighting at Quatre Bras the two opposing commanders Ney and Wellington initially held their ground while they obtained information about what had happened at the larger Battle of Ligny. With the defeat of the Prussians Napoleon still had the initiative, for Ney's failure to take the Quatre Bras cross roads had actually placed the Anglo-allied army in a precarious position. Ney, reinforced by D'Erlon's fresh corps, lay in front of Wellington, and Ney could have fastened upon the Anglo-allied army and held it in place during the early morning of 17 June, sufficiently long to allow Napoleon to close round his foe's open left flank and deal him a deathblow. But it did not happen because the French were desultory in the aftermath of Ligny. Napoleon wasted the morning of 17 June by taking a late breakfast and going to see the previous day's battlefield before organising a pursuit of the two Coalition armies. He took the reserves and marched with Ney in pursuit of the Duke of Wellington's Anglo-allied army, and he gave instructions to Marshal Grouchy to pursue the Prussians wherever they were going and harry them so that they had no time to reorganise. After their defeat at the Battle of Ligny the Prussians successfully disengaged and