 Complete the following phrase:  After the withdrawal from Gallipoli, the battalion returned to Egypt where the AIF underwent a period of reorganisation and expansion. As a part of this process, the 9th Battalion provided a cadre of experienced personnel to the newly formed 49th Battalion. In March 1916, the battalion sailed to France as the AIFs infantry divisions were transferred to the Western Front. On arrival, the 9th Battalion deployed to the Somme, experiencing its first major action at 