hes wearing a star ribbon,which must be the 1914-15 star,he has 4 blue overseas chevrons which means he was in F+F in 1915 and not before,the ribbon was issued 1918,the war and victory medals were issued in 1919,he isnt wearing those which dates the picture from between jan 1918 and no later than mid 1919,hes hiding his left hand,he may have been wounded,mack