The tidings, which became known on the 14th November, of the happy result of the action at Coulmiers on the 9th, had rekindled in Paris universal hope. No one doubted that the enemy would find it necessary to send large forces in the Orleans direction, which would considerably weaken the investment line, particularly in its southern section.

In order to contribute towards the hoped-for approaching relief by active co-operation, three separate armies were formed out of the garrison of Paris.

The first, under General ClÉment Thomas, consisted of 226 battalions of the National Guard, in round numbers 130,000 men. Its duty was the defence of the enceinte and the maintenance of quietude within the city. The second, under General Ducrot, constituted the most trustworthy element, especially the troops of the former XIIIth and XIVth Corps. This army was apportioned into three (Infantry) Corps and one Cavalry Division, and it consisted of fully 100,000 men and more than 300 guns. It was designed for active service in the field, and for making sorties on the investing forces. The third army, under General Vinoy, 70,000 strong, was made up of six Divisions of Gardes-Mobiles and one Cavalry Division; and to it also Maud'huy's Division of the line was assigned. It was to aid the more important sorties by diversions on subordinate fronts. In addition to all these details, 80,000 Gardes-Mobiles were in the forts, and 35,000 more in St. Denis under Admiral de la RonciÈre.

The available military strength consequently amounted to above 400,000 men.

The garrison exhibited a lively activity in petty nocturnal enterprises. The heavy guns of the defences carried to Choisy le Roi, and even as far as Beauregard, near Versailles. On the peninsula of Gennevilliers trenchwork was energetically set about, and the task of bridge-building was undertaken. Many signs pointed to an intended effort on the part of the French to break out in a westerly direction. But since, as long as the IInd Army was still incomplete, the greatest danger threatened from the south, the supreme Command in Versailles, as already mentioned, ordered the IInd Corps into the position behind the Yvette from Villeneuve to Saclay. On the north of Paris the Guard Corps extended itself leftward as far as Aulnay, the XIIth sent one brigade across to the south bank of the Marne, and the WÜrtemberg Division moved into the interval between the Marne and the Seine caused by the shifting of the IInd Corps.

On November 18th the summons from Tours reached Paris, calling on the latter with all promptitude to reach the hand to the Army of the Loire; certainly somewhat prematurely, since, as we know, that army was at the time concerning itself only in regard to defensive measures.

In Paris all preparations were actually made for a great sortie. But as the earlier attacks on the front of the VIth Corps had shown that this section of the investment was materially strengthened by fortifications about Thiais and Chevilly, it was decided in the first instance to gain the plateau east of Joinville and from thence to bend rightward towards the south. The attention of the Germans was to be distracted by attacks in the opposite direction.

On the 18th,[45] the day on which the Army of Orleans had vainly striven to press forward to Beaune la Rolande, General Ducrot assembled the IInd Army of Paris in the neighbourhood of Vincennes, and Mont Avron was occupied on the following day by Hugues' Division of the IIIrd Army. As, however, the construction of the bridges (over the Marne) at Champigny and Bry was delayed, the battle was postponed till the 30th; but it was left to the commanders of the subordinate affairs to carry them out simultaneously with the chief enterprise or in advance of it. Accordingly, Maud'huy's Division assembled in the night of 28th—29th behind the redoubt of Hautes BruyÈres, and advanced against L'Hay before daybreak.

Warned by the heavy firing from the southern forts, General von TÜmpling (commanding VIth Corps) had early ordered the 12th Division to get under arms in its fighting positions, and the 11th to assemble at Fresnes.

The French, favoured by the darkness, made their way through the vineyards into L'Hay; but were successfully driven back by the Germans with the bayonet and clubbed arms.

After a prolonged fire-fight, the French renewed their onslaught at 8.30, but without success; and then the defenders, reinforced from the reserve, retaliated with a vigorous counterstroke. At ten o'clock the enemy retreated to Villejuif.

Admiral Pothuau at the same time had moved up the Seine with Marines and National Guards. An outpost at Gare aux Boeufs was surprised and captured, and Choisy le Roi was fired upon by field-guns, fortress artillery, and gunboats which appeared on the Seine. Just as the Grenadiers of the 10th (Prussian) Regiment were on the point of making an attack, General Vinoy broke off the fight.

This demonstration cost the French 1000 men and 300 uninjured prisoners; the Prussians, remaining under cover, lost only 140 men. The fortress kept up its fire till mid-day, and then the enemy was allowed a short truce, to remove his numerous wounded.

Against the front of the Vth Corps also, a strong infantry force advanced at eight o'clock upon Garches and Malmaison, and drove in part of the outposts. But it soon found itself opposed by closed battalions, and at noon retreated to ValÉrien.