The Canadians take over the Australian sector, recapture Poziers Ridge, first use of the tank on the Western Front: WSs of devastated battlefield with soldiers moving here and there, a horse artillery unit moving by. Various views of Canadians marching by, of the whole battlefield in the vicinity of Poziers Ridge and La Boiselle. HAS of Canadians filing into a communication trench. LS of Pozieres Ridge with the odd explosion visible. MSs of Canadian soldiers climbing out of their trenches. LS of soldiers racing across no man's land. MSs of men running through smoke during attack. PAN of row of British tanks. Three shots showing rear of huge tanks on the move.