The Halifax Explosion was the largest man-made explosion of the pre-nuclear era. On the morning of December 6, 1917, the Norwegian ship SS Imo and the French munitions ship SS Mont-Blanc collided as they made their way through Halifax’s busy harbor. The impact ignited Mont-Blanc’s explosive cargo, resulting in an explosive blast that instantly leveled an entire district and triggered a tsunami. This 14-karat gold coin commemorates the 100th anniversary of the Halifax Explosion of 1917 through two powerfully symbolic elements that are associated with this maritime disaster, which remains one of the worst Canadian tragedies of all time.