The unknown and the despised elements proved Von Kluck's undoing. Before he had gone very far he found the completely ignored British Army on top of him, and the totally unexpected Sixth French Army on his right flank. Quickly realising his peril, he decided to retire. In the meantime, on the French side, General Foch, who was about in the centre of the French line, saw an opportunity, which he promptly seized, of driving a wedge between the armies of Von Hausen and Von Bülow. The situation was now entirely changed. The lately triumphant German forces were no longer even moderately secure, and decided on a general retirement all along the line. It was on September 5 that Sir John French and General Joffre conferred together and decided to take the offensive. To the British Army was assigned the space between the Fifth and Sixth French Armies. This meant a change of front, and hence that welcome order to the 2nd Battalion Grenadiers to move due east instead of south. That evening Field-Marshal Sir John French issued the following orders: (1) The enemy has apparently abandoned the idea of advancing on Paris and is contracting his front and moving south-east. (2) The Army will advance eastward with a view to attacking. Its left will be covered by the French Sixth Army also marching east, and its right will be linked to the French Fifth Army marching north. (3) In pursuance of the above the following moves will take place, the Army facing east on completion of the movement. First Corps: right on La-Chapelle-Iger, left on Lumigny, move to be completed 9 A.M. Second Corps: right on La Houssaye, left in neighbourhood of Villeneuve, move to be completed 10 A.M. Third Corps: facing east in the neighbourhood of Bailly, move to be completed 10 A.M. Cavalry Division (less 3rd and 5th Brigades): to guard front and flanks of First Corps on the line Jouy-le-Chatel (connecting the French Fifth Army)--Coulommiers (connecting the 3rd and 5th Brigades). The 3rd and 5th Cavalry Brigades will cease to be under the orders of the First Corps and will act in concert under instructions issued by Brigadier-General Gough. They will cover the Second Corps connecting with the Cavalry Division on the right and with the Sixth French Army on the left. [Sidenote: Sept. 6.] Sunday, the 6th, was the joyful day when there came this turn of the tide, and that morning Sir John French issued an order to his Army in which he said: