(November 30th and December 2nd.)
On November 30th the IInd Paris Army opened the battle which was to decide the fate of the capital.
To hinder the reinforcement of the Germans towards the real point of attack, almost every section of their line of investment was again engrossed by sorties.
To the duty of pushing an attack against the southern front, General Ducrot assigned Susbielle's Division of his IInd Corps. It reached Rosny so early as three o'clock in the morning, crossed the Marne at Créteil by a field-bridge, and from thence, briskly supported by the nearest forts, opened fire on the outpost line of the Würtemberg Division, which had been pushed forward to Bonneuil and Mesly.
General von Obernitz (commanding the Division) had an extended position to maintain. His 1st Brigade was at Villiers on the peninsula of Joinville, his 2nd at Sucy en Brie, and his 3rd at Brévannes. The Division was placed under the Commander of the Army of the Meuse, who had been instructed from Versailles to reinforce it strongly by the XIIth Corps, or even by troops of the Guard Corps.
From the great accumulation of hostile forces on Mont Avron, the Saxon Corps believed itself directly threatened on the right bank of the Marne, and requested to be immediately transferred to the left; the Crown Prince of Saxony gave the order that the whole 24th Division should assemble there on the following day.
Thus for the present the only aid that could be rendered to the Würtembergers was from the wing of the IInd Corps at Villeneuve, of which the 7th Infantry Brigade moved up near Brévannes to Valenton.
The fire of its three batteries hurrying thither, first brought the advance of the French Division to a stand. The attempt of the Würtembergers to seize Mont-Mesly failed at first; but after a strenuous artillery fire they succeeded in carrying the hill by twelve o'clock, and the Prussian battalions forced their way into Mesly. The Würtemberg horse cut in upon the enemy's retreating guns with great success. At 1.30 the re-opening of the fire from the forts proclaimed the end of this sortie. It cost the Germans 350 men, and the French 1200.
During this time the front of the VIth Corps had not been at all molested. General Vinoy, who had not been informed of the advance of Susbielle's Division, when its retreat was noticed caused to be opened from Fort Ivry and the adjoining works a brisk fire, which was augmented by gunboats on the Seine and armour-plated batteries on the railway. Then Admiral Pothuau advanced against Choisy le Roi and Thiais. His Marines, after driving out the Prussian fore-posts, again settled themselves firmly in Gare aux Bœufs. But the further advance failed, and General Vinoy recalled his troops, after which the fighting at Mesly ceased, and only the thunder of artillery continued till five o'clock.
After a preliminary cannonade from Valérien the Gardes-Mobiles advanced against the front of the Vth Corps about seven o'clock. They were, however, repulsed by the outposts and supporting troops in readiness, and retired at eleven o'clock.