[Title: Canadian troops take part in last exercise before going overseas (Petawawa, Ontario)] Shots of troops arriving by truck on snow-covered field. Shots of artillery waiting for signal. A group of men come out of a trench with a Bangalore torpedo, deposit same on barbed wire entanglement and run for cover. LS of explosion. Shots of a barrage and of the advance by the infantry. MLS of the smokey explosion. FOLLOW SHOT of Bren gun carrier speeding across the field, with machine gunner standing and firing the mounted machine gun.