Lead-up to Vimy Ridge: WS of Sir Julian Byng and his staff posing for the camera. PAN of map of Vimy Ridge area with staff officers studying it. Two shots of Canadian soldiers racing past during training manoeuvres. Two shots of artillery being moved up, of men positioning field pieces. MS of Canadian soldiers moving in single file carrying heavy pieces of "tump line" (a Canadian invention) on their backs, of them preparing trenches for battle. Various shots of large and small guns firing away, explosions in the distance. MS of large railway gun firing, crew loading up, ramming the shell in, closing the breech. MCU of huge gun firing.