Welcome to the Miracle at Marne Map Game. The Point of Divergence is the Battle of Marne, considered the Miracle at Marne (OTL). From September 5th to September 12th of 1914. The Germans began a strong campaign to crush France during the first month of the war. This led the Battle of Marne in which the Germans following a revision of tactics won the battle and went on to win the war for the most part gaining large amounts of new territory from the war and managed to capitalize on the breakup of her allies for her own personal gain.