from Ligny III Corps (Thielmann's), which had left its cantonments around Ciney at 07:30, passed the night at Namur, about from Ligny IV Corps (Bölow's), supposed by Blücher to be then at Hannut, was still at Liège, about distant from Ligny. Prussian and French casualties The loss of the Prussian I Corps on 15 June, amounted to 1,200 men. The Fusilier Battalions of the 28th Regiment and of the 2nd Westphalian Landwehr, reduced to mere skeletons, were united, and formed into one battalion. The French forces which attacked the Prussian I Corps sustained casualties of between 300 and 400 men Anglo-allied engagements First news at Quatre Bras The extreme left of the Duke of Wellington's army, composed of 2nd Netherlands Division (Perponcher's), rested upon the Charleroi-Brussels road. The 2nd Brigade (Colonel Goedecke's) of this division, was located thus: 1st Battalion of the 2nd Regiment of Nassau (Büsgen's), at Houtain-le-Val; 2nd Battalion (Normann's), at Frasnes-lez-Gosselies and Villers-Perwin; 3rd Battalion (Hechmann's), at , Quatre Bras and Sart-Dames-Avelines; both battalions of the 28th Regiment of Orange-Nassau (Prince Bernhard's), at Genappe. There was also at Frasnes a Dutch horse artillery battery, under Captain Byleveld. Early on the morning of 15 June, these troops were unaware of the advance of the French army, when they heard a brisk cannonade at a distance in the direction of Charleroi. But they had not received any warning of the French advance, and they concluded that the firing was Prussian artillery practice, which they had frequently heard before, and to which they had become accustomed. However, as noon approached the cannonade became louder, and in the afternoon a wounded Prussian soldier arrived warning them of the advance of the French. A messenger was immediately sent with this information to the Regimental headquarters, from where it was also sent to Perponcher's headquarters at Nivelles. Perponcher immediately ordered both brigades of his division to hurry towards their respective points of assembly - the 1st Brigade (General Bylandt's) to Nivelles, and the 2nd Brigade (Goedecke's) to Quatre Bras. In the meantime Major Normann, who commanded the 2nd Battalion of the 2nd Regiment of Nassau, drew up his battalion with the battery in position in rear of Frasnes upon the road to Quatre Bras. He also posted an observation in advance of the village. Opening of direct hostilities About 18:00, parties of French lancers belonging to Piré's Light Cavalry Division of Reille's Corps