The Halifax Explosion occurred on Thursday, December 6, 1917, when the city of Halifax

City of Halifax

Halifax is a city in Canada, which was the capital of the province of Nova Scotia and shire town of Halifax County. It was the largest city in Atlantic Canada until it was amalgamated into Halifax Regional Municipality in 1996...

, Nova Scotia

Nova Scotia

Nova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, was devastated by the huge detonation of the SS Mont-Blanc

SS Mont-Blanc

The SS Mont-Blanc was a French freighter which exploded while carrying ammunition in Halifax Harbour on December 6, 1917 causing the Halifax Explosion which killed 2000 people. The explosion was caused by a collision with the Norwegian ship SS Imo...

, a French

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 cargo ship

Cargo ship

A cargo ship or freighter is any sort of ship or vessel that carries cargo, goods, and materials from one port to another. Thousands of cargo carriers ply the world's seas and oceans each year; they handle the bulk of international trade...

, fully loaded with wartime explosives, which accidentally collided with the Norwegian

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 SS Imo

SS Imo

SS Imo, was a steamship which served in passenger and freight trades and later as a whaling supply ship. She is most famous as one of the two ships which collided to cause the Halifax Explosion in 1917.-Early career:...

 in "The Narrows" section of the Halifax Harbour

Halifax Harbour

Halifax Harbour is a large natural harbour on the Atlantic coast of Nova Scotia, Canada, located in the Halifax Regional Municipality.-Harbour description:The harbour is called Jipugtug by the Mi'kmaq first nation, anglisized as Chebucto...

. About 2,000 people were killed by debris, fires, or collapsed buildings and it is estimated that over 9,000 people were injured. The Halifax Explosion remains the world's largest man-made accidental explosion.

At 8:40 in the morning, the SS Mont-Blanc, chartered by the French government to carry munitions to Europe, collided with the unloaded Norwegian ship Imo, chartered by the Commission for Relief in Belgium to carry relief supplies.