 Complete the following phrase:  The Battle of Caporetto, in October 1917, was disastrous to the army, and on 8 November 1917, he was called to succeed Cadorna as chief of general staff by 9 November. Having recovered what remained of the army, he organised the resistance in 1917 on the Monte Grappa massif and along the Piave River, which successfully halted the Austro-Hungarian offensive in the 