Canada's Hundred Days was the name given to the series of attacks made by the Canadian Corps between 8 August and 11 November 1918, during the Hundred Days Offensive of World War I by the French after the war. Reference to this period as Canada's Hundred Days is due to the role that the Canadian Corps repeatedly played as a spearhead during offensives.

The Canadian Corps was a World War I corps formed from the Canadian Expeditionary Force in September 1915 after the arrival of the 2nd Canadian Division in France. The corps was expanded by the addition of the 3rd Canadian Division in December 1915 and the 4th Canadian Division in August 1916. The organization of a 5th Canadian Division began in February 1917 but it was still not fully formed when it was broken up in February 1918 and its men used to reinforce the other four divisions.