Days to Remember: The British Empire in the Great War
“ The First Battle of the Marne may well rank as the greatest, because the most critical, contest of the war. It was decisive in the sense that it defeated Germany's first plan of campaign. She had hoped for a "battle without a morrow"; but the battle had been fought and the morrow was come. She was now compelled to accept the slow war of entrenchments, and to see every week bringing her nearer to the condition of a beleaguered city. The immediate cause of victory was Maunoury's flank attack, which opened the way for the British and Franchet d'Esperey. ”
