On 5 August, Joffre ordered an offensive by the VII Corps, on the right flank of the First Army, to begin on 7 August towards Mulhouse. The capture of the 2nd Army order of battle on 7 August, convinced Joffre that the strength of the German forces on the flanks had left the centre weak and vulnerable to an offensive towards Neufchâteau and Arlon. On 8 August, Joffre issued General Instruction No. 1, containing his strategic intent, which was to destroy the German army rather than capture ground. The offensive into Alsace and that by the First and Second armies into Lorraine, would pin down German forces and attract reinforcements, as the main offensive further north drove in the German centre and outflanked the German forces in Belgium from the south. Joffre expected that the attack into the German centre would meet little resistance. The First and Second armies would advance south of the German fortified area from Metz–Thionville, with the Fourth Reserve Group guarding the northern flank near Hirson, to watch the Chimay Gap and deflect a German attack from the north or east. The strategy assumed that the main German force would be deployed around Luxembourg and from Metz–Thionville, with smaller forces in Belgium. On 9 August, an intelligence report had one German active corps near Freiburg close to the Swiss border, three near Strasbourg, four in Luxembourg to the north of Thionville and six from Liège in Belgium, towards the north end of Luxembourg, which left five corps un-located. The French general staff inferred that they were between Metz-Thionville and Luxembourg, ready to advance towards Sedan or Mézières.