 Complete the following phrase:  As assistant Commander-in-Chief with responsibility for co-ordinating the activities of the northern French armies and liaising with the British forces; this was a key appointment as the Race to the Sea was then in progress. General Joseph Joffre, Commander-in-Chief C-in-C of the French Army, had also wanted to nominate Foch as his successor in case of accident, to make sure the job would not be given to Joseph Gallieni, but the French Government would not agree to this. When the Germans attacked on 13 October, they narrowly failed to break through the British and French lines. They tried again at the end of the month during the 