On 4 December 1915, Gellibrand received a promotion to lieutenant colonel, and was given command of the 12th Infantry Battalion, the 1st Division's Tasmanian battalion, then resting on Lemnos. It did not return to Anzac, which was evacuated on 20 December 1915. Instead, the battalion returned to Egypt, arriving at Alexandria on 6 January 1916. Gellibrand would not lead it into battle. On 1 March 1916 he was again promoted, this time to full colonel and temporary brigadier general, and given command of the 6th Infantry Brigade, on the specific request of Legge. Apparently Gellibrand had greatly impressed Legge during his time as AA &amp; QMG of the 2nd Division. The 6th Infantry Brigade sailed for the Western Front just a few days later, on 19 March 1916, and entered the line there on 10 April. On 31 May, Gellibrand was wounded by a German shell that had landed close to his headquarters and was evacuated to England, returning on 28 June. The brigade fought at Pozières, where it performed well in the attack on 4 August. He was mentioned in despatches once more.