|William James Beales and his sister Rosina|
He must have remained in the army beyond the end of the war in 1918 because he received an Indian General Service medal, which was awarded to everyone who served in the so-called "Third Anglo-Afghan War" of 1919.
The Machine Gun Corps was formed in 1915 and included infantry, cavalry and motor units. The Essex Yeomanry were associated with the 8th Cavalry Brigade of the 3rd Cavalry division, though it's unclear if this was William's unit. According to the website Golden Map
The MGC saw action in all the main theatres of war, including France, Belgium, Palestine,Mesopotamia, Egypt, Salonika, East Africa and Italy. In its short history the MGC gained an enviable record for heroism as a front line fighting force. Indeed, in the latter part of the war, as tactics changed to defence in depth, it commonly served well in advance of the front line. It had a less enviable record for its casualty rate. Some 170,500 officers and men served in the MGC with 62,049 becoming casualties, including 12,498 killed, earning it the nickname 'the Suicide Club'.
It would be fascinating to know whether William Beales and Thomas Ward served together at any time during the war.