In Paris General Ducrot had been busily employed in making good the losses sustained in the battle of Villiers. A part of the greatly reduced Ist Corps had to be consigned to the reserve; the IInd Army was reorganized. A projected sortie by way of the peninsula of Gennevillers and the heights of Franconville had not been approved by the government. There was the confident expectation of seeing the Army of Orleans appear within a short time before the capital, and steps were being taken to reach it the hand, when on the 6th December a letter from General von Moltke announced the defeat of General d'Aurelle and the occupation of Orleans. A sortie to the south would thenceforth be aimless, and after long deliberation it was at length decided to break through the enemy's lines in a northern direction by a sortie in great force.

It was true that the Morée brook afforded the besiegers some cover on that side, but only so long as the ice would not bear. And there were but three German corps of the gross strength of 81,200, extended over a front of about twenty-seven miles.[59]

By way of preparation earthworks were begun to be thrown up on the 13th, between Bondy and Courneuve, the forts of the north front were furnished with a heavier artillery equipment, and the plateau of Mont Avron was occupied by batteries. Ninety rounds of ammunition were served out to each man, with six days' rations; and four days' fodder for the horses. Packs were not to be carried, but rolled tent-pieces were to be worn as breast-protection. December 19th was the day first set for the enterprise, but there was a postponement to the 21st.

Thus, during the larger half of December the investing army had remained almost wholly undisturbed by the defenders. Regular food, warm winter clothing, and abundant supplies of comforts which the exertions of the postal service afforded, had maintained the troops in a thoroughly satisfactory condition.

The preparations which the garrison was making for a new effort did not escape the notice of the besieging forces. Deserters brought in reports of an imminent sortie. On the 20th information came from the posts of observation that large masses of troops were assembling about Merlan and Noisy le Sec; and early on the 21st the 2nd Guard Division, by order of the Commander-in-Chief of the Army of the Meuse, stood in readiness at the passages of the Morée. Part of the 1st Division remained in reserve at Gonesse; the other portion was to be relieved by the 7th Division, and made available for action. On the right wing the Guard Landwehr Division occupied the section from Chatou to Carrières St. Denis; on the left a brigade of the Saxon Corps held Sévran. The 4th Infantry Division of the IInd Corps moved to Malnoue to support, in case of need, the Würtembergers, to whom was allotted the task of holding resolutely the advanced position of Joinville opposite the French.

To divert the attention of the Germans from the true point of attack, a brisk fire was to be opened in early morning from Fort Valérien; strong bodies were to assail the right wing of the Guard Corps, General Vinoy was to lead the IIIrd Army against the Saxons, and Admiral de la Roncière was to fall upon Le Bourget with his Army Corps. This latter post, projecting as it did so prominently, it was essential to seize first of all, and not till then was General Ducrot, with the IInd Paris Army, to cross the Morée near Blanc Mesnil and Aulnay.

(Combat of le Bourget, 21st December.)—Le Bourget was held by only four companies of the Queen Elizabeth Regiment, and one Guard Rifle battalion. When the mist rose at a quarter to eight, there was rained on the garrison a heavy fire from the guns of the forts and many batteries, as well as from armour-clad railway trucks. Half an hour later closed hostile columns marched on the place from east and west. In the former direction its outskirts were successfully defended for some time against seven French battalions, and on the opposite side five more were brought to a halt by the quick fire of the defenders in front of the cemetery[60]; but a detachment of marine fusiliers penetrated unhindered into the village by its northern entrance. Pressed upon on all sides by overwhelming numbers, the defenders were compelled to fall back into the southern part of the village. The garrison of the cemetery also strove to force its way thither, but part of it fell into the enemy's hands. The French advanced only step by step, suffering heavy loss in bloody street-fighting, but they did not succeed in obtaining possession of the buildings or glass-factory. Five fresh battalions of the French reserve marched up from St. Denis on the gas-works, and battered down the garden-wall with cannon-fire, but still could not crush there the steady resistance of the Germans.

At nine o'clock the latter were reinforced by one company, and at ten o'clock by seven more companies, which in a bloody hand-to-hand struggle, fought their way to the cemetery and glass-factory. By eleven the last bodies of assailants were driven out, and Le Bourget, in expectation of a renewed attack, was occupied by fifteen companies. Two batteries of field artillery, which had been in brisk action on the Morée, were brought up to the village.

General Ducrot had meanwhile waited in vain for the signal which was to have announced the capture of Le Bourget. He had pushed forward the heads of his columns beyond Bondy and Drancy, when he was warned by the disastrous issue of the struggle on his left to abandon his intended attack on the line of the Morée.

The anticipated important enterprise lapsed into a mere cannonade, to which the German field-guns did their best to reply. In the afternoon the French retired from the field.