<Ul> <Li> Order of Battle </Li> </Ul> <Li> Order of Battle </Li> <P> The Second Battle of the Marne (French: Seconde Bataille de la Marne), or Battle of Reims (15 July--6 August 1918) was the last major German offensive on the Western Front during the First World War . The attack failed when an Allied counterattack, supported by several hundred tanks, overwhelmed the Germans on their right flank, inflicting severe casualties . The German defeat marked the start of the relentless Allied advance which culminated in the Armistice with Germany about 100 days later . </P> <P> Following the failure of the Spring Offensive to end the conflict, Erich Ludendorff, Chief Quartermaster General, believed that an attack through Flanders would give Germany a decisive victory over the British Expeditionary Force (BEF). To shield his intentions and draw Allied troops away from Belgium, Ludendorff planned for a large diversionary attack along the Marne . </P>

How long did the second battle of marne last
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