NAPOLEON having calculated that an effective force of 800,000 men would be requisite to enable him to oppose the Allies with full confidence of success, had given orders for the formation, at the Regimental Depôts, of the 3rd, 4th, and 5th Battalions of every Regiment of Infantry, and of the 4th and 5th Squadrons of every Regiment of Cavalry; also for the additional formation of 30 Battalions of Artillery Train, of 20 Regiments of the Young Guard, of 10 Battalions of Waggon Train, and of 20 Regiments of Marines. These and other measures he anticipated would furnish the force desired, but not until the 1st of October. The movements of the Allies, however, and his projected plan of active operations, precluded the possibility of his waiting for their full accomplishment. To augment the means of local defence, instructions were also issued for the reorganisation of the National Guard throughout the Empire, by which it was divided into 3130 Battalions, and was to form, _when complete_, no less a force than 2,250,000 men! * * * * * Out of the disposable force of the troops of the Line, and partly also out of the National _Guard d'élite_, were formed seven _Corps d'Armée_, four Corps of Reserve Cavalry, four Corps of Observation, and an Army of the West or of La Vendée. The Army of the North, generally designated the Grand Army, was to be considered as acting under the immediate orders of the Emperor. It consisted of five _Corps d'Armée_ (the First, Second, Third, Fourth, and Sixth), all the Reserve Cavalry, and the Imperial Guard. Its total force amounted to nearly 120,000 men; and its distribution, in the early part of June, was as follows:-- The First _Corps d'Armée_ commanded by Count D'ERLON, had its Head Quarters at Lille; the Second, under the orders of Count REILLE, was cantoned in the environs of Valenciennes; the Third, under Count VANDAMME, was assembled in the environs of Mézières; the Fourth, under Count GÉRARD, in the environs of the Metz; and the Sixth Corps, commanded by Count LOBAU, was stationed at Laon. The four Corps of Reserve Cavalry under the chief command of Marshal GROUCHY, were in cantonments between the Aisne and the Sambre. The Imperial Guard was in Paris. The Fifth _Corps d'Armée_, commanded by Count RAPP, formed the basis of an Army of the Rhine, and consisted of about 36,000 men. Its Head Quarters were at Strasburg, and it occupied the principal points along that part of the frontier between Landau and Hagenau; communicating with the Fourth _Corps d'Armée_ on its left, as also with the First Corps of Observation on its right.