 Complete the following phrase:  The brigade, including 23rd Londons returned from Khartoum, assembled at Abbassia Camp in Cairo and prepared to reinforce the Mediterranean Expeditionary Force fighting at Gallipoli. However, the brigade did not proceed as a complete formation, the battalions proceeding individually. The 21st and 23rd Battalions were the first to go, in September, being sent via Mudros to reinforce the Regulars of the 29th Division. The 23rd Londons landed at 