Facing the German extreme right, was the Sixth French Army, one of the great reserves of General Joffre, which had been steadily building up since August 29, 1914, with its right on the Marne and its left at Betz, in the Ourcq Valley, encamped on the western side of that stream, facing the Second and Fourth Corps of the Germans. The strengthening of that army from the forces at Paris was hourly, and while three or four days before it had been felt that the Sixth French Army was too weak to be placed in so vital a point--that it should have been supplemented with the Ninth Army--the results justified the French generalissimo's plans and more than justified his confidence in the British Army, or Expeditionary Force, which faced the tip of the German right wing drive and was encamped on a line from Villeneuve le Comte to Jouy le Chatel, the center of the British army being at a point five miles southeast of Coulommiers. This army was under the command of General Sir John French. The right center of the German line was held by General von Buelow's army, consisting of the Ninth Corps, the Tenth Corps, the Tenth Reserve Corps, and the Guard Corps. This army also was encamped upon the Marne, stretching from the eastern end of General Von Kluck's army as far as Epernay. This army thus held the Forests of Vassy but was confronted by the marshes of St. Gond. Confronting this right center was, first of all, General Conneau's Cavalry Corps, which was in touch with the right wing of the British army under Sir John French. Then, holding the line from Esternay to Courtacon lay the Fifth French Army under General d'Esperey. Full in face of the strongest part of the German right center stood one of the strongest of General Joffre's new reserves, the Ninth Army under General Foch, with the marshes of St. Gond in front of him, and holding a twenty-mile line from Esternay, past Sezanne to Camp de Mailly, a remarkably well-equipped army, very eager for the fray. The hastily replenished corps, largely of Saxons, which had been General von Hausen's army, lay next to General von Buelow, a little north of Vitry, and as it proved, a weak spot in the German line. The left center of the attacking force was under the command of the Duke of Wuerttemberg and extended across the whole southern end of the plain of Champagne to the upper streams of the Aisne south of St. Menhould. The extreme left of this advanced line was the army of the Imperial Crown Prince, holding the old line on the Argonne to the south of Verdun. In close relation to this advanced line, but not directly concerned with the battles of the Marne, were the armies of the Bavarian Crown Prince, encamped in the plateau of the Woevre, engaged largely in the task of holding open the various lines of communication, while far to the south, in the vicinity of the much battered little town of Mulhouse, lay the remains of the decimated army of the Alsace campaigns under General von Heeringen.