 Complete the following phrase:  Johnston fought in the First World War, serving on the frontlines of the Western Front with the original Expeditionary Force, being wounded four times and rising to the rank of Brigadier General. Initially Johnston served as signals officer for 7 Infantry Brigade. He went on to serve in that capacity with 3rd Division before becoming, in turn, Brigade Major, Commanding Officer 10th Battalion Cheshire Regiment and finally Officer Commanding 126 Infantry Brigade. Johnston took part in the engagements at 