Hundred Days Offensive
For other uses, see Hundred Days (disambiguation). Hundred Days Offensive Part of the Western Front of World War I Allied gains in late 1918 Date 8 August – 11 November 1918 Location Amiens, France to Mons, Belgium Coordinates: 49°53′38.09″N 2°17′39.30″E / 49.8939139°N 2.2942500°E / 49.8939139; 2.2942500 Result Decisive Allied victory Collapse of the Western Front End of World War I Collapse of the German Empire Belligerents France British Empire United Kingdom Australia Canada India Newfoundland New Zealand South Africa United States Belgium Portugal Siam Italy [1] [2] German Empire Austria-Hungary Commanders and leaders Ferdinand Foch Philippe Pétain Douglas Haig John J. Pershing King Albert I Paul von Hindenburg Erich Ludendorff Wilhelm Groener Strength Strength on 11 November 1918: [3] c. 2,559,000 c. 1,900,000 c. 1,900,000 [4] c. 190,000 Strength on 11 November 1918: [3] c. 3,562,000 Casualties and losses 18 July – 11 Novembe...