A battalion of infantry is a chameleon, ceaselessly changing its colour to suit the changing complexions of its commanding officers. The Fourth Canadian Battalion followed the rule.
But the madness of the Fourth appears to have been an intermittent fever. Birchall engendered it, Colquhoun advertised it, Rae damped down the fire. For with the coming of Rae we first discern another element creeping in, which seems as difficult to mix with the rugged abandon of the early days as oil with water—the element of cold discipline.
(Lieut. Pedley, Only This, 1999, 18)
A native of Scotland, William Rae was born on 15 January 1883 in Aberdeen. He immigrated to Canada in 1907, moved to British Columbia and joined the 72nd Seaforth Highlanders Regiment. At the outbreak of the Great War, the five-foot-six Scotsman enlisted with the 16th Battalion. Rae fought at Second Ypres during the German gas attack and was the only company commander in the 16th to survive the battle. By June 1916, he had transferred to the 4th Battalion in order to take command from Lieutenant Colonel Malcolm Colquhoun.