Passage: The Hundred Days Offensive (8 August to 11 November 1918) was an Allied offensive which ended the First World War. Beginning with the Battle of Amiens (8–12 August) on the Western Front, the Allies pushed Central Powers back after their gains from the Spring Offensive. The Germans eventually retreated to the Hindenburg Line, culminating in the Armistice of 11 November 1918. The term "Hundred Days Offensive" does not refer to a battle or strategy, but rather the rapid series of Allied victories against which the German armies had no reply.

Question: How many day did the last offensive of the first world war last?
Hundred Days