<Li> Hundred Days <Ul> <Li> Amiens </Li> </Ul> </Li> <Ul> <Li> Amiens </Li> </Ul> <P> The Hundred Days Offensive was the final period of the First World War, during which the Allies launched a series of offensives against the Central Powers on the Western Front from 8 August to 11 November 1918, beginning with the Battle of Amiens . The offensive essentially pushed the Germans out of France, forcing them to retreat beyond the Hindenburg Line, and was followed by an armistice . The term "Hundred Days Offensive" does not refer to a specific battle or unified strategy, but rather the rapid series of Allied victories starting with the Battle of Amiens . </P> <P> The Spring Offensive of the German Army on the Western Front had begun on 21 March 1918 with Operation Michael and had petered out by July . The Germans had advanced to the river Marne but failed to achieve a decisive breakthrough . When Operation Marne - Rheims ended in July, the Allied supreme commander Ferdinand Foch ordered a counter-offensive which became known as the Second Battle of the Marne . The Germans, recognising their untenable position, withdrew from the Marne towards the north . For this victory, Foch was granted the title Marshal of France . </P>

When did britain launch major offense on western front