On This Day In History

History.com: The Great Halifax Explosion (1917)

At 9:05 a.m., in the harbor of Halifax in the Canadian province of Nova Scotia, the most devastating manmade explosion in the pre-atomic age occurs when the Mont Blanc, a French munitions ship, explodes 20 minutes after colliding with another vessel.

As World War I raged in Europe, the port city of Halifax bustled with ships carrying troops, relief supplies, and munitions across the Atlantic Ocean. On the morning of December 6, the Norwegian vessel Imo left its mooring in Halifax harbor for New York City. At the same time, the French freighter Mont Blanc, its cargo hold packed with highly explosive munitions–2,300 tons of picric acid, 200 tons of TNT, 35 tons of high-octane gasoline, and 10 tons of gun cotton–was forging through the harbor’s narrows to join a military convoy that would escort it across the Atlantic.

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