" His advance threatened the right flank of von Bulow's forces, while the German Second Army's left stalled in the Marshes of St. Gond under desperate counterattack by Ferdinand Foch.  
On the eve of this battle, General Lanrezac was replaced in command of the Fifth Army by Franchet d'Esperey, known to his allies as "Desperate Frankie." His advance threatened the right flank of von Bulow's forces, while the German Second Army's left stalled in the Marshes of St. Gond under desperate counterattack by Ferdinand Foch.  Meanwhile in the west, Maunoury's "mediocre value" reserve divisions and Sir John French's British Expeditionary Force attacked von Kluck's German First Army. An order by Gallieni saw the first use of motorized vehicles on the battlefield when six hundred taxis delivered French reserves to the front. FTP, identify this September 1914 battle that halted the Schlieffen Plan and prevented the capture of Paris.
On the eve of this battle, General Lanrezac was replaced in command of the Fifth Army by Franchet d'Esperey, known to his allies as "Desperate Frankie.
First Battle of the Marne