Description: The largest explosion the world had ever known destroyed much of Halifax city. On the morning of December 6, 1917, two ships collided and caught fire in Halifax harbour, igniting 3,000 tonnes of munitions and explosives. Six square kilometres of Halifax was simply wiped out. The explosion killed 2,000 people and wounded another 9,000. It was the most devastating disaster on Canadian soil. From the television series "Canada: A People's History." Includes links to educational resources, bibliography, games, puzzles, and video clips.