Trench warfare: MS of Canadian soldiers wearing rubber capes marching in the rain. PAN of trench with soldiers in it. PAN of parapet, reduced to quagmire by the rain. HA PAN of trench, muddy and water-logged, a corpse visible in the foreground. MS of soldiers bringing back wounded from battle. WS of horse artillery unit crossing bridge of logs. PAN of decimated battlefield. Various shots of batteries firing at the enemy, explosions on a ridge. WS of Scottish Highlanders crossing the battlefield in their kilts. Montage with iris transitions showing Canadians advancing through ruins in November 1916 from the Somme to Vimy Ridge.