 Complete the following phrase:  Mobilisation began at the onset of the war, in August 1914, at which time the 1st Kings was based at Aldershot. Under command of Lieutet-Colonel W.S. Bannatyne, the 1st Kings boarded the SS Irrawaddy at Southampton. The battalion landed at Le Havre on 13 August with the 6th Brigade, 2nd Division, one of the original components of the British Expeditionary Force BEF. The BEF first engaged the German Army at Mons, Belgium, after which it went into a retreat that was sustained until 5 September, when the Allies resolved to 